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entitled 'The Nation's Long-Term Fiscal Outlook: September 2008 Update' 
which was released on November 7, 2008.

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United States Government Accountability Office: 
GAO: 

The Nation's Long-Term Fiscal Outlook: 

September 2008 Update: 

GAO-09-94R: 

GAO's Long-Term Fiscal Simulations: 

Since 1992, GAO has published long-term fiscal simulations of what 
might happen to federal deficits and debt levels under varying policy 
assumptions. We developed our long-term model in response to a 
bipartisan request from Members of Congress who were concerned about 
the long-term effects of fiscal policy. 

GAO runs two simulations: 

* "Baseline Extended" follows the Congressional Budget Office's (CBO) 
September baseline estimates for the first 10 years and then simply 
holds revenue and spending other than large entitlement programs 
constant as a share of gross domestic product (GDP). 

* The "Alternative" simulation is based on historical trends and recent 
policy preferences. Discretionary spending grows with GDP rather than 
inflation during the first 10 years, Medicare physician payment rates 
are not reduced as in CBO's baseline, and all tax provisions are 
extended until 2018 and then revenues are brought back to about their 
historical level. 

We update our simulations as new estimates become available from CBO 
and the Social Security and Medicare Trustees. This update incorporates 
CBO's most recent baseline projections that were released in September. 

This product responds to congressional interest in receiving updated 
simulation results. For more information, contact Susan J. Irving at 
(202) 512-8288 or irvings@gao.gov. 

[End of section] 

Recently the President, the Congress, and the American people have been 
focused on addressing problems with financial markets and the 
appropriate response to a weakening economy. However, once the current 
challenges are resolved, the next President, the next Congress, and the 
nation will need to focus with the same intensity on the nation's long-
term fiscal challenge. As shown in figure 1 below, our updated 
simulations continue to show escalating and persistent deficits that 
illustrate the long-term fiscal outlook is unsustainable. The federal 
government faces large and growing structural deficits driven primarily 
by rising health care costs and known demographic trends. Furthermore, 
these simulations do not yet reflect recent actions taken by the 
federal government to support the financial sector. GAO's Long-Term 
Fiscal Simulations: 

Figure 1: Unified Surpluses and Deficits under Alternative Fiscal 
Policy Simulations: 

[See PDF for image] 

This figure is a multiple line graph depicting the following data: 

Unified Surpluses and Deficits under Alternative Fiscal Policy 
Simulations: 

Year: 2000; 
Baseline extended: 2.433%; 
Alternative Simulation: 2.433%. 

Year: 2001; 
Baseline extended: 1.274%; 
Alternative Simulation: 1.274%. 

Year: 2002; 
Baseline extended: -1.52%; 
Alternative Simulation: -1.52%. 

Year: 2003; 
Baseline extended: -3.495%; 
Alternative Simulation: -3.495%. 

Year: 2004; 
Baseline extended: -3.588%; 
Alternative Simulation: -3.588%. 

Year: 2005; 
Baseline extended: -2.602%; 
Alternative Simulation: -2.602%. 

Year: 2006; 
Baseline extended: -1.908%; 
Alternative Simulation: -1.908%. 

Year: 2007; 
Baseline extended: -1.178%; 
Alternative Simulation: -1.178%. 

Year: 2008; 
Baseline extended: -2.867%; 
Alternative Simulation: -2.8679%. 

Year: 2009; 
Baseline extended: -2.977%; 
Alternative Simulation: -3.431%. 

Year: 2010; 
Baseline extended: -2.783%; 
Alternative Simulation: -3.386%. 

Year: 2011; 
Baseline extended: -1.981%; 
Alternative Simulation: -3.674%. 

Year: 2012; 
Baseline extended: -0.729%; 
Alternative Simulation: -3.762%. 

Year: 2013; 
Baseline extended: -0.814%; 
Alternative Simulation: -4.164%. 

Year: 2014; 
Baseline extended: -0.902%; 
Alternative Simulation: -4.563%. 

Year: 2015; 
Baseline extended: -0.825%; 
Alternative Simulation: -4.783%. 

Year: 2016; 
Baseline extended: -1.011; 
Alternative Simulation: -5.185. 

Year: 2017; 
Baseline extended: -0.814; 
Alternative Simulation: -5.462. 

Year: 2018; 
Baseline extended: -0.605; 
Alternative Simulation: -5.774. 

Year: 2019; 
Baseline extended: -0.801; 
Alternative Simulation: -5.906. 

Year: 2020; 
Baseline extended: -1.128; 
Alternative Simulation: -6.16. 

Year: 2021; 
Baseline extended: -1.373; 
Alternative Simulation: -6.5283. 

Year: 2022; 
Baseline extended: -1.731; 
Alternative Simulation: -7.021. 

Year: 2023; 
Baseline extended: -2.007; 
Alternative Simulation: -7.444. 

Year: 2024; 
Baseline extended: -2.397%; 
Alternative Simulation: -8.013%. 

Year: 2025; 
Baseline extended: -2.705%; 
Alternative Simulation: -8.48%. 

Year: 2026; 
Baseline extended: -3.101%; 
Alternative Simulation: -9.047%. 

Year: 2027; 
Baseline extended: -3.412%; 
Alternative Simulation: -9.531%. 

Year: 2028; 
Baseline extended: -3.832%; 
Alternative Simulation: -10.128%. 

Year: 2029; 
Baseline extended: -4.16%; 
Alternative Simulation: -10.639%. 

Year: 2030; 
Baseline extended: -4.582%; 
Alternative Simulation: -11.25%. 

Year: 2031; 
Baseline extended: -5.01%; 
Alternative Simulation: -11.875%. 

Year: 2032; 
Baseline extended: -5.337%; 
Alternative Simulation: -12.403%. 

Year: 2033; 
Baseline extended: -5.763%; 
Alternative Simulation: -13.033%. 

Year: 2034; 
Baseline extended: -6.092%; 
Alternative Simulation: -13.572%. 

Year: 2035; 
Baseline extended: -6.521%; 
Alternative Simulation: -14.152%. 

Year: 2036; 
Baseline extended: -6.955%; 
Alternative Simulation: -14.7951%. 

Year: 2037; 
Baseline extended: -7.287%; 
Alternative Simulation: -15.344%. 

Year: 2038; 
Baseline extended: -7.771%; 
Alternative Simulation: -15.985%. 

Year: 2039; 
Baseline extended: -8.034%; 
Alternative Simulation: -16.528%. 

Year: 2040; 
Baseline extended: -8.455%; 
Alternative Simulation: -17.173%. 

Year: 2041; 
Baseline extended: -8.88%; 
Alternative Simulation: -17.823%. 

Year: 2042; 
Baseline extended: -9.211%; 
Alternative Simulation: -18.381%. 

Year: 2043; 
Baseline extended: -9.644%; 
Alternative Simulation: -19.04%. 

Year: 2044; 
Baseline extended: -9.987%; 
Alternative Simulation: -19.61%. 

Year: 2045; 
Baseline extended: -10.435%; 
Alternative Simulation: -20.288%. 

Year: 2046; 
Baseline extended: -10.795%; 
Alternative Simulation: -20.881%. 

Year: 2047; 
Baseline extended: -11.259%; 
Alternative Simulation: -21.579%. 

Year: 2048; 
Baseline extended: -11.636%; 
Alternative Simulation: -22.196%. 

Year: 2049; 
Baseline extended: -12.121%; 
Alternative Simulation: -22.921%. 

Year: 2050; 
Baseline extended: -12.518%; 
Alternative Simulation: -23.562%. 

Source: GAO’s September 2008 analysis based on the Social Security and 
Medicare Trustees’ assumptions. 

[End of figure] 

Figure 1 shows GAO's two alternative fiscal policy simulations based on 
the Social Security and Medicare Trustees' projections.[Footnote 1] CBO 
also produces long-term estimates of these programs. Beginning with 
this update, we show the long-term outlook under both sets of 
projections. A comparison of the two sets of simulations is presented 
later in this report.[Footnote 2] Under either set of projections, the 
long-term outlook is unsustainable. 

Why Does It Matter? 

Our long-term simulations show that absent policy actions aimed at 
deficit reduction, the federal government faces unsustainable growth in 
debt. Such growth would inevitably result in declining GDP and future 
living standards. Even before such effects, these debt paths would 
likely result in rising inflation, higher interest rates, and the 
unwillingness of foreign investors to invest in a weakening American 
economy. 

Furthermore, under our Alternative simulation, which assumes revenue to 
be at about the 40-year historical average, growth in spending on major 
entitlement programs and the interest on national debt will absorb the 
lion's share of the government's resources. Just 10 years from now in 
this simulation that is based on historical trends and recent policy 
preferences, 76 cents of every dollar of federal revenue will be spent 
on retirees and their health care providers, health care providers for 
the poor, and our bond holders. This leaves little room for other 
priorities, such as national defense and investment in infrastructure 
and alternative energy sources, and threatens the government's fiscal 
ability to respond to national emergencies, both natural and manmade. 

The longer action to deal with the nation's long-term fiscal outlook is 
delayed, the greater the risk that the eventual changes will be 
disruptive and destabilizing. For example, even under our more 
optimistic Baseline Extended scenario, waiting until 2040 to balance 
the budget would require drastic change. To balance the budget in that 
year, federal revenue as a share of GDP would have to increase by more 
than 40 percent or noninterest federal spending would have to be cut by 
more than one-third. If changes in federal individual income taxes were 
the sole means used to balance the budget, these would have to increase 
by more than three-quarters in that year assuming no changes to the 
composition of revenues after 2018. Sudden, drastic changes of either 
kind--and revenues at such a level--have not been seen in this country 
since the end of World War II. Acting sooner rather than later will 
provide more time to phase in gradual changes, while also providing 
more time for those likely to be most affected to make compensatory 
changes. 

Reducing the deficit and associated borrowing can free up resources in 
the budget to address national priorities and generate increases in 
economic growth by increasing national saving and private investment. 
Domestic investment can boost productivity of the nation's workforce 
and lead to higher real wages and greater economic growth over the long 
term. 

What Has Changed since Our Last Federal Model Update? 

Our simulations were updated using CBO's most recent 10-year baseline 
projections.[Footnote 3] Deterioration in the long-term budget outlook 
was expected because of the supplemental funding for the global war on 
terrorism that was enacted in June and the continued weak economic 
outlook. 

CBO's September projections show a dramatic worsening in the budget 
outlook since March due in part to the baseline conventions that CBO 
follows. Specifically, in developing its 10-year projections, CBO 
adjusts appropriations for the most recent year for inflation. CBO's 
baseline includes $111 billion in supplemental appropriations for 2008 
and $75.5 billion for 2009 based on legislation passed in June. This 
increased spending in CBO's baseline by $1.2 trillion over the 10-year 
projection period and led to changes in our long-term assumptions for 
discretionary spending of about 0.7 percent of GDP in our Baseline 
Extended simulation and 0.2 percent of GDP in our Alternative 
simulation. 

Another large contributor to the worsened budget outlook is the 
economy. Rising energy and food prices led CBO to increase its 
inflation projections for 2008 and 2009. Higher inflation can increase 
government spending because it leads to higher cost-of-living 
adjustments for programs such as Social Security and Food Stamps, and 
increased interest payments on the debt. CBO also reduced its 
projection of real GDP growth. According to CBO, the deficit worsened 
by about $85 billion per year over the first 10 years largely due to a 
near-term jump in inflation and the weakening economy. 

Recent actions taken to stabilize the financial system and economy, 
such as those regarding Fannie Mae and Freddie Mac, are not included in 
CBO's baseline estimates but will be incorporated into the federal 
budget estimates in January 2009. The overall effect on the budget 
outlook is unknown at this time. 

What Drives Our Nation's Long-Term Fiscal Outlook? 

While the factors driving our near-term outlook can and have been quite 
volatile, the long-term fundamentals have not changed. Our population 
is still aging and health care costs are still rising faster than the 
economy. The oldest members of the baby-boom generation are now 
eligible for Social Security retirement benefits and will be eligible 
for Medicare benefits in less than 3 years. According to the Social 
Security Administration, nearly 80 million Americans will become 
eligible for Social Security retirement benefits over the next two 
decades--an average of more than 10,000 per day. Although Social 
Security is important because of its size, the real driver of the long-
term fiscal outlook is health care spending. 

Spending on the major federal health programs (i.e., Medicare and 
Medicaid) represents a much larger, faster-growing, and more immediate 
problem. In fact, the federal government's future obligations for 
Medicare Part D alone exceed the unfunded obligations for Social 
Security. Over the past several decades, health care spending per 
capita has grown on average about 2.5 percent faster than average 
annual real GDP per capita, absorbing increasing shares of the nation's 
resources. Several key factors have contributed to growth: (1) 
increased utilization of new and existing medical technology; (2) lack 
of reliable comparative information on medical outcomes, quality of 
care, and cost; and (3) increased prevalence of risk factors such as 
obesity that can lead to expensive chronic conditions. Rapid growth in 
health care spending is projected to continue. 

Figures 2 and 3 show revenue and the composition of federal spending 
under our simulations based on the Trustees' assumptions. As these 
figures show, the growth in Social Security, Medicare, Medicaid, and 
interest on debt held by the public dwarfs the growth in all other 
types of spending. In these figures the category "all other spending" 
includes much of what many think of as "government"--discretionary 
spending on such activities as national defense, homeland security, 
veterans health benefits, national parks, highways and mass transit, 
and foreign aid, plus mandatory spending on the smaller entitlement 
programs such as Supplemental Security Income, Temporary Assistance for 
Needy Families, and farm price supports.[Footnote 4] 

Figure 2: Potential Fiscal Outcomes under Baseline Extended: Revenue 
and Composition of Spending as Shares of GDP: 

[See PDF for image] 

This figure is a combination line and stacked vertical bar graph 
depicting the following data: 

Fiscal year 2008: 
Net interest: 1.7%; 
Social Security: 4.3%; 
Medicare & Medicaid: 4.1%; 
All other spending: 10.6%; 
Revenue: 17.9%. 

Fiscal year 2018: 
Net interest: 1.8%; 
Social Security: 5%; 
Medicare & Medicaid: 5.4%; 
All other spending: 8.8%; 
Revenue: 20.4%. 

Fiscal year 2030: 
Net interest: 2.3%; 
Social Security: 6%; 
Medicare & Medicaid: 8%; 
All other spending: 8.8%; 
Revenue: 20.4%. 

Fiscal year 2040: 
Net interest: 4.2%; 
Social Security: 6.1%; 
Medicare & Medicaid: 9.7%; 
All other spending: 8.8%; 
Revenue: 20.4%. 

Source: GAO’s September 2008 analysis based on the Social Security and 
Medicare Trustees’ assumptions. 

Notes: In addition to the expiration of tax cuts, revenue as a share of 
GDP increases through 2018 because of (1) real bracket creep, (2) more 
taxpayers becoming subject to the alternative minimum tax (AMT), and 
(3) increased revenue from tax-deferred retirement accounts. After 
2018, revenue as a share of GDP is held constant--implicitly assuming 
that action is taken to offset increased revenue from real bracket 
creep, the AMT, and tax-deferred retirement accounts. 

[End of figure] 

Figure 3: Potential Fiscal Outcomes under Alternative Simulation: 
Revenue and Composition of Spending as Shares of GDP: 

[See PDF for image] 

[See PDF for image] 

This figure is a combination line and stacked vertical bar graph 
depicting the following data: 

Fiscal year 2008: 
Net interest: 1.7%; 
Social Security: 4.3%; 
Medicare & Medicaid: 4.2%; 
All other spending: 10.6%; 
Revenue: 17.9%. 

Fiscal year 2018: 
Net interest: 2.9%; 
Social Security: 5%; 
Medicare & Medicaid: 5.8%; 
All other spending: 10%; 
Revenue: 17.9%. 

Fiscal year 2030: 
Net interest: 5.7%; 
Social Security: 6%; 
Medicare & Medicaid: 8.2%; 
All other spending: 10%; 
Revenue: 18.6%. 

Fiscal year 2040: 
Net interest: 9.7%; 
Social Security: 6.1%; 
Medicare & Medicaid: 10%; 
All other spending: 10%; 
Revenue: 18.6%. 

Source: GAO’s September 2008 analysis based on the Social Security and 
Medicare Trustees’ assumptions. 

Notes: Discretionary spending grows with GDP after 2008. The AMT 
exemption amount is retained at the 2007 level through 2018 and 
expiring tax provisions are extended. After 2018, revenue as a share of 
GDP is brought to its 40-year historical average of 18.3 percent plus 
expected revenues from deferred taxes (i.e., taxes on withdrawals from 
retirement accounts). Medicare spending is based on the Trustees' 2008 
intermediate projections adjusted for the Centers for Medicare & 
Medicaid Services (CMS) alternative assumption that physician payment 
rates are not reduced as specified under current law. 

[End of figure] 

A key assumption in examining the long-term outlook for the federal 
budget is excess health care cost growth, or the percentage by which 
growth of health care costs for an individual exceeds the growth of GDP 
per individual. Our simulations after the first 10 years have used the 
Medicare Board of Trustees' assumptions, which may be viewed as 
conservative. The Trustees assume that excess cost growth will average 
one percentage point, which is lower than the historical average of 2.5 
percentage points. 

As noted, CBO also produces long-term projections of these programs, 
and its assumptions yield even less favorable outcomes. Figure 4 
compares the results from our simulations based on the Trustees' 
assumptions to simulations in which we use CBO's assumptions for Social 
Security, Medicare, and Medicaid. The outlook is very similar through 
about 2050 after which deficits under CBO's assumptions grow more 
rapidly. The key difference between CBO's and the Trustees' projections 
is the assumption about excess health care cost growth. Whereas the 
Medicare Trustees assume that excess cost growth will average one 
percent over the long term, CBO assumes excess cost growth will average 
1.7 percentage points for Medicare and 0.9 percentage points for 
Medicaid. In general, CBO assumes health care cost growth will moderate 
when health care cost increases would otherwise cause a reduction in 
real nonhealth consumption. Medicaid spending growth slows more than 
Medicare spending growth because CBO assumes that states have more 
flexibility to respond to the budgetary pressures and are likely to 
take actions to reduce spending (e.g., limiting services or 
eligibility) even without changes to federal law. 

Figure 4: Federal Surpluses/Deficits under Alternative Assumptions of 
Long-Term Entitlement Spending: 

[See PDF for image] 

This figure is a multiple line graph depicting the following data: 

Federal Surpluses/Deficits under Alternative Assumptions of 
Long-Term Entitlement Spending (percent of GDP): 

Fiscal year 2000; 
Baseline (Trustees[A]): 2.433; 
Alternative: 2.433; 
Baseline w/CBO (Trustees[A]): 2.433; 
Alternative w/CBO: 2.433. 

Fiscal year 2001; 
Baseline (Trustees[A]): 1.274; 
Alternative: 1.274; 
Baseline w/CBO (Trustees[A]): 1.274; 
Alternative w/CBO: 1.274. 

Fiscal year 2002; 
Baseline (Trustees[A]): -1.52; 
Alternative: -1.52; 
Baseline w/CBO (Trustees[A]): -1.52; 
Alternative w/CBO: -1.52. 

Fiscal year 2003; 
Baseline (Trustees[A]): -3.495; 
Alternative: -3.495; 
Baseline w/CBO (Trustees[A]): -3.495; 
Alternative w/CBO: -3.495. 

Fiscal year 2004; 
Baseline (Trustees[A]): -3.588; 
Alternative: -3.588; 
Baseline w/CBO (Trustees[A]): -3.588; 
Alternative w/CBO: -3.588. 

Fiscal year 2005; 
Baseline (Trustees[A]): -2.602; 
Alternative: -2.602; 
Baseline w/CBO (Trustees[A]): -2.602; 
Alternative w/CBO: -2.602. 

Fiscal year 2006; 
Baseline (Trustees[A]): -1.908; 
Alternative: -1.908; 
Baseline w/CBO (Trustees[A]): -1.908; 
Alternative w/CBO: -1.908. 

Fiscal year 2007; 
Baseline (Trustees[A]): -1.178; 
Alternative: -1.178; 
Baseline w/CBO (Trustees[A]): -1.178; 
Alternative w/CBO: -1.178. 

Fiscal year 2008; 
Baseline (Trustees[A]): -2.867; 
Alternative: -2.867; 
Baseline w/CBO (Trustees[A]): -2.867; 
Alternative w/CBO: -2.867. 

Fiscal year 2009; 
Baseline (Trustees[A]): -2.977; 
Alternative: -3.431; 
Baseline w/CBO (Trustees[A]): -2.977; 
Alternative w/CBO: -3.345. 

Fiscal year 2010; 
Baseline (Trustees[A]): -2.783; 
Alternative: -3.386; 
Baseline w/CBO (Trustees[A]): -2.783; 
Alternative w/CBO: -3.292. 

Fiscal year 2011; 
Baseline (Trustees[A]): -1.98; 
Alternative: -3.674; 
Baseline w/CBO (Trustees[A]): -1.98; 
Alternative w/CBO: -3.622. 

Fiscal year 2012; 
Baseline (Trustees[A]): -0.729; 
Alternative: -3.762; 
Baseline w/CBO (Trustees[A]): -0.729; 
Alternative w/CBO: -3.659. 

Fiscal year 2013; 
Baseline (Trustees[A]): -0.814; 
Alternative: -4.164; 
Baseline w/CBO (Trustees[A]): -0.814; 
Alternative w/CBO: -4.039. 

Fiscal year 2014; 
Baseline (Trustees[A]): -0.902; 
Alternative: -4.563; 
Baseline w/CBO (Trustees[A]): -0.902; 
Alternative w/CBO: -4.435. 

Fiscal year 2015; 
Baseline (Trustees[A]): -0.825; 
Alternative: -4.783; 
Baseline w/CBO (Trustees[A]): -0.825; 
Alternative w/CBO: -4.751. 

Fiscal year 2016; 
Baseline (Trustees[A]): -1.011; 
Alternative: -5.185; 
Baseline w/CBO (Trustees[A]): -1.011; 
Alternative w/CBO: -5.123. 

Fiscal year 2017; 
Baseline (Trustees[A]): -0.814; 
Alternative: -5.462; 
Baseline w/CBO (Trustees[A]): -0.814; 
Alternative w/CBO: -5.391. 

Fiscal year 2018; 
Baseline (Trustees[A]): -0.605; 
Alternative: -5.774; 
Baseline w/CBO (Trustees[A]): -0.605; 
Alternative w/CBO: -5.675. 

Fiscal year 2019; 
Baseline (Trustees[A]): -0.801; 
Alternative: -5.906; 
Baseline w/CBO (Trustees[A]): -0.739; 
Alternative w/CBO: -5.726. 

Fiscal year 2020; 
Baseline (Trustees[A]): -1.128; 
Alternative: -6.16; 
Baseline w/CBO (Trustees[A]): -0.999; 
Alternative w/CBO: -5.942. 

Fiscal year 2021; 
Baseline (Trustees[A]): -1.373; 
Alternative: -6.528; 
Baseline w/CBO (Trustees[A]): -1.189; 
Alternative w/CBO: -6.353. 

Fiscal year 2022; 
Baseline (Trustees[A]): -1.731; 
Alternative: -7.021; 
Baseline w/CBO (Trustees[A]): -1.512; 
Alternative w/CBO: -6.78. 

Fiscal year 2023; 
Baseline (Trustees[A]): -2.007; 
Alternative: -7.444; 
Baseline w/CBO (Trustees[A]): -1.827; 
Alternative w/CBO: -7.23. 

Fiscal year 2024; 
Baseline (Trustees[A]): -2.397; 
Alternative: -8.013; 
Baseline w/CBO (Trustees[A]): -2.088; 
Alternative w/CBO: -7.756. 

Fiscal year 2025; 
Baseline (Trustees[A]): -2.705; 
Alternative: -8.48; 
Baseline w/CBO (Trustees[A]): -2.398; 
Alternative w/CBO: -8.266. 

Fiscal year 2026; 
Baseline (Trustees[A]): -3.101; 
Alternative: -9.047; 
Baseline w/CBO (Trustees[A]): -2.733; 
Alternative w/CBO: -8.776. 

Fiscal year 2027; 
Baseline (Trustees[A]): -3.412; 
Alternative: -9.531; 
Baseline w/CBO (Trustees[A]): -3.147; 
Alternative w/CBO: -9.369. 

Fiscal year 2028; 
Baseline (Trustees[A]): -3.832; 
Alternative: -10.128; 
Baseline w/CBO (Trustees[A]): -3.519; 
Alternative w/CBO: -9.923. 

Fiscal year 2029; 
Baseline (Trustees[A]): -4.16; 
Alternative: -10.639; 
Baseline w/CBO (Trustees[A]): -3.886; 
Alternative w/CBO: -10.476. 

Fiscal year 2030; 
Baseline (Trustees[A]): -4.582; 
Alternative: -11.25; 
Baseline w/CBO (Trustees[A]): -4.323; 
Alternative w/CBO: -11.106. 

Fiscal year 2013; 
Baseline (Trustees[A]): -5.01; 
Alternative: -11.875; 
Baseline w/CBO (Trustees[A]): -4.652; 
Alternative w/CBO: -11.709. 

Fiscal year 2032; 
Baseline (Trustees[A]): -5.337; 
Alternative: -12.403; 
Baseline w/CBO (Trustees[A]): -5.072; 
Alternative w/CBO: -12.361. 

Fiscal year 2033; 
Baseline (Trustees[A]): -5.763; 
Alternative: -13.033; 
Baseline w/CBO (Trustees[A]): -5.482; 
Alternative w/CBO: -12.905. 

Fiscal year 2034; 
Baseline (Trustees[A]): -6.092; 
Alternative: -13.572; 
Baseline w/CBO (Trustees[A]): -5.882; 
Alternative w/CBO: -13.494. 

Fiscal year 2035; 
Baseline (Trustees[A]): -6.521; 
Alternative: -14.152; 
Baseline w/CBO (Trustees[A]): -6.349; 
Alternative w/CBO: -14.113. 

Fiscal year 2036; 
Baseline (Trustees[A]): -6.955; 
Alternative: -14.795; 
Baseline w/CBO (Trustees[A]): -6.751; 
Alternative w/CBO: -14.726. 

Fiscal year 2037; 
Baseline (Trustees[A]): -7.287; 
Alternative: -15.344; 
Baseline w/CBO (Trustees[A]): -7.073; 
Alternative w/CBO: -15.341. 

Fiscal year 2038; 
Baseline (Trustees[A]): -7.711; 
Alternative: -15.985; 
Baseline w/CBO (Trustees[A]): -7.525; 
Alternative w/CBO: -16.042. 

Fiscal year 2039; 
Baseline (Trustees[A]): -8.034; 
Alternative: -16.528; 
Baseline w/CBO (Trustees[A]): -7.971; 
Alternative w/CBO: -16.715. 

Fiscal year 2040; 
Baseline (Trustees[A]): -8.455; 
Alternative: -17.173; 
Baseline w/CBO (Trustees[A]): -8.31; 
Alternative w/CBO: -17.285. 

Fiscal year 2041; 
Baseline (Trustees[A]): -8.88; 
Alternative: -17.823; 
Baseline w/CBO (Trustees[A]): -8.782; 
Alternative w/CBO: -17.989. 

Fiscal year 2042; 
Baseline (Trustees[A]): -9.211; 
Alternative: -18.381; 
Baseline w/CBO (Trustees[A]): -9.169; 
Alternative w/CBO: -18.685. 

Fiscal year 2043; 
Baseline (Trustees[A]): -9.644; 
Alternative: -19.04; 
Baseline w/CBO (Trustees[A]): -9.598; 
Alternative w/CBO: -19.301. 

Fiscal year 2044; 
Baseline (Trustees[A]): -9.987; 
Alternative: -19.61; 
Baseline w/CBO (Trustees[A]): -10.124; 
Alternative w/CBO: -19.964. 

Fiscal year 2045; 
Baseline (Trustees[A]): -10.435; 
Alternative: -20.288; 
Baseline w/CBO (Trustees[A]): -10.543; 
Alternative w/CBO: -20.667. 

Fiscal year 2046; 
Baseline (Trustees[A]): -10.795; 
Alternative: -20.881; 
Baseline w/CBO (Trustees[A]): -11.014; 
Alternative w/CBO: -21.402. 

Fiscal year 2047; 
Baseline (Trustees[A]): -11.259; 
Alternative: -21.579; 
Baseline w/CBO (Trustees[A]): -11.443; 
Alternative w/CBO: -22.147. 

Fiscal year 2048; 
Baseline (Trustees[A]): -11.636; 
Alternative: -22.196; 
Baseline w/CBO (Trustees[A]): -12.014; 
Alternative w/CBO: -22.92. 

Fiscal year 2049; 
Baseline (Trustees[A]): -12.121; 
Alternative: -22.921; 
Baseline w/CBO (Trustees[A]): -12.512; 
Alternative w/CBO: -23.718. 

Fiscal year 2050; 
Baseline (Trustees[A]): -12.518; 
Alternative: -23.562; 
Baseline w/CBO (Trustees[A]): -13.055; 
Alternative w/CBO: -24.542. 

Fiscal year 2051; 
Baseline (Trustees[A]): -13.024; 
Alternative: -24.313; 
Baseline w/CBO (Trustees[A]): -13.55; 
Alternative w/CBO: -25.294. 

Fiscal year 2052; 
Baseline (Trustees[A]): -13.442; 
Alternative: -24.98; 
Baseline w/CBO (Trustees[A]): -14.167; 
Alternative w/CBO: -26.173. 

Fiscal year 2053; 
Baseline (Trustees[A]): -13.969; 
Alternative: -25.754; 
Baseline w/CBO (Trustees[A]): -14.773; 
Alternative w/CBO: -27.04. 

Fiscal year 2054; 
Baseline (Trustees[A]): -14.412; 
Alternative: -26.449; 
Baseline w/CBO (Trustees[A]): -15.33; 
Alternative w/CBO: -27.862. 

Fiscal year 2055; 
Baseline (Trustees[A]): -14.968; 
Alternative: -27.259; 
Baseline w/CBO (Trustees[A]): -15.925; 
Alternative w/CBO: -28.723. 

Fiscal year 2056; 
Baseline (Trustees[A]): -15.442; 
Alternative: -27.991; 
Baseline w/CBO (Trustees[A]): -16.582; 
Alternative w/CBO: -29.726. 

Fiscal year 2057; 
Baseline (Trustees[A]): -15.924; 
Alternative: -28.733; 
Baseline w/CBO (Trustees[A]): -17.23; 
Alternative w/CBO: -30.676. 

Fiscal year 2058;
Baseline (Trustees[A]): -16.513; 
Alternative: -29.584; 
Baseline w/CBO (Trustees[A]): -17.903; 
Alternative w/CBO: -31.628. 

Fiscal year 2059; 
Baseline (Trustees[A]): -17.013; 
Alternative: -30.352; 
Baseline w/CBO (Trustees[A]): -18.605; 
Alternative w/CBO: -32.616. 

Fiscal year 2060; 
Baseline (Trustees[A]): -17.622; 
Alternative: -31.229; 
Baseline w/CBO (Trustees[A]): -19.312; 
Alternative w/CBO: -33.609. 

Fiscal year 2061; 
Baseline (Trustees[A]): -18.142; 
Alternative: -32.02; 
Baseline w/CBO (Trustees[A]): -20.119; 
Alternative w/CBO: -34.631. 

Fiscal year 2062; 
Baseline (Trustees[A]): -18.77; 
Alternative: -32.922; 
Baseline w/CBO (Trustees[A]): -20.81; 
Alternative w/CBO: -35.661. 

Fiscal year 2063; 
Baseline (Trustees[A]): -19.312; 
Alternative: -33.74; 
Baseline w/CBO (Trustees[A]): -21.528; 
Alternative w/CBO: -36.697. 

Fiscal year 2064; 
Baseline (Trustees[A]): -19.963; 
Alternative: -34.671; 
Baseline w/CBO (Trustees[A]): -22.29; 
Alternative w/CBO: -37.758. 

Fiscal year 2065; 
Baseline (Trustees[A]): -20.53; 
Alternative: -35.52; 
Baseline w/CBO (Trustees[A]): -23.063; 
Alternative w/CBO: -38.831. 

Fiscal year 2066; 
Baseline (Trustees[A]): -21.206; 
Alternative: -36.481; 
Baseline w/CBO (Trustees[A]): -23.924; 
Alternative w/CBO: -39.921. 

Fiscal year 2067; 
Baseline (Trustees[A]): -21.794; 
Alternative: -37.357; 
Baseline w/CBO (Trustees[A]): -24.77; 
Alternative w/CBO: -41.12. 

Fiscal year 2068; 
Baseline (Trustees[A]): -22.487; 
Alternative: -38.342; 
Baseline w/CBO (Trustees[A]): -25.606; 
Alternative w/CBO: -42.291. 

Fiscal year 2069; 
Baseline (Trustees[A]): -23.094; 
Alternative: -39.244; 
Baseline w/CBO (Trustees[A]): -26.456; 
Alternative w/CBO: -43.455. 

Fiscal year 2070; 
Baseline (Trustees[A]): -23.712; 
Alternative: -40.159; 
Baseline w/CBO (Trustees[A]): -27.338; 
Alternative w/CBO: -44.654. 

Fiscal year 2071; 
Baseline (Trustees[A]): -24.436; 
Alternative: -41.181; 
Baseline w/CBO (Trustees[A]): -28.16; 
Alternative w/CBO: -45.869. 

Fiscal year 2072; 
Baseline (Trustees[A]): -25.07; 
Alternative: -42.118; 
Baseline w/CBO (Trustees[A]): -29.126; 
Alternative w/CBO: -47.186. 

Fiscal year 2073; 
Baseline (Trustees[A]): -25.812; 
Alternative: -43.164; 
Baseline w/CBO (Trustees[A]): -30.098; 
Alternative w/CBO: -48.487. 

Fiscal year 2074; 
Baseline (Trustees[A]): -26.467; 
Alternative: -44.126; 
Baseline w/CBO (Trustees[A]): -31.029; 
Alternative w/CBO: -49.826. 

Fiscal year 2075; 
Baseline (Trustees[A]): -27.231; 
Alternative: -45.2; 
Baseline w/CBO (Trustees[A]): -31.988; 
Alternative w/CBO: -51.15. 

Fiscal year 2076; 
Baseline (Trustees[A]): -27.906; 
Alternative: -46.188; 
Baseline w/CBO (Trustees[A]): -32.973; 
Alternative w/CBO: -52.478. 

Fiscal year 2077; 
Baseline (Trustees[A]): -28.689; 
Alternative: -47.288; 
Baseline w/CBO (Trustees[A]): -34.065; 
Alternative w/CBO: -53.919. 

Fiscal year 2078; 
Baseline (Trustees[A]): -29.385; 
Alternative: -48.304; 
Baseline w/CBO (Trustees[A]): -35.106; 
Alternative w/CBO: -55.311. 

Fiscal year 2079; 
Baseline (Trustees[A]): -30.189; 
Alternative: -49.431; 
Baseline w/CBO (Trustees[A]): -36.146; 
Alternative w/CBO: -56.706. 

Fiscal year 2080; 
Baseline (Trustees[A]): -30.906; 
Alternative: -50.475; 
Baseline w/CBO (Trustees[A]): -37.21; 
Alternative w/CBO: -58.128. 

Fiscal year 2081; 
Baseline (Trustees[A]): -31.631; 
Alternative: -51.528; 
Baseline w/CBO (Trustees[A]): -38.323; 
Alternative w/CBO: -59.603. 

Fiscal year 2082; 
Baseline (Trustees[A]): -32.463; 
Alternative: -52.693; 
Baseline w/CBO (Trustees[A]): -39.415; 
Alternative w/CBO: -61.059. 

Source: GAO’s September 2008 analysis. 

Notes: CBO's projections are from Updated Long-Term Projections for 
Social Security (August 2008) and The Long-Term Budget Outlook 
(December 2007). 

[A] Some adjustments are made to Trustees' assumptions. 

[End of figure] 

Indeed, the future growth of health care costs is uncertain, but figure 
4 shows that under a range of reasonable assumptions, the long-term 
outlook is unsustainable. 

State and Local Governments Face Similar Long-Term Fiscal Challenges: 

Rapidly rising health care costs are not simply a federal budget 
problem; they are our nation's number-one long-term fiscal challenge. 
Growth in health-related spending--Medicaid and health insurance for 
state and local employees and retirees--is the primary driver of the 
long-term fiscal challenges facing the state and local governments. 
Figure 5 presents the results of our simulations that combine the 
federal government's fiscal outlook with that of the state and local 
government sector.[Footnote 5] Like the federal sector, the state and 
local sector's fiscal outlook has deteriorated. As is true in the 
federal simulations, the state and local simulation does not yet 
reflect stress in the financial sector. A forthcoming product will 
provide additional information on GAO's updated state and local sector 
model. The simulations imply that the aggregate fiscal outcome of the 
state and local government sector will add to the nation's fiscal 
difficulties and suggest that these fiscal challenges cannot be 
remedied simply by shifting the burden from one sector to another. 

Figure 5: Federal and Combined Federal, State, and Local Surpluses and 
Deficits as a Share of GDP: 

[See PDF for image] 

This figure is a multiple line graph depicting the following data: 

Fiscal year: 2000; 
Federal surplus/deficit[A]: 2.4%; 
Combined surplus/deficit: 2.1% 

Fiscal year: 2001; 
Federal surplus/deficit[A]: 1.3%; 
Combined surplus/deficit: 0.5%. 

Fiscal year: 2002; 
Federal surplus/deficit[A]: -1.5%; 
Combined surplus/deficit: -2.7%. 

Fiscal year: 2003; 
Federal surplus/deficit[A]: -3.5%; 
Combined surplus/deficit: -4.5%. 

Fiscal year: 2004; 
Federal surplus/deficit[A]: -3.6%; 
Combined surplus/deficit: -4.4. 

Fiscal year: 2005; 
Federal surplus/deficit[A]: -2.6%; 
Combined surplus/deficit: -3.1%. 

Fiscal year: 2006; 
Federal surplus/deficit[A]: -1.9%; 
Combined surplus/deficit: -2.3%. 

Fiscal year: 2007; 
Federal surplus/deficit[A]: -1.2%; 
Combined surplus/deficit: -1.9%. 

Fiscal year: 2008; 
Federal surplus/deficit[A]: -2.9%; 
Combined surplus/deficit: -4.1%. 

Fiscal year: 2009; 
Federal surplus/deficit[A]: -3.4%; 
Combined surplus/deficit: -4.8%. 

Fiscal year: 2010; 
Federal surplus/deficit[A]: -3.4%; 
Combined surplus/deficit: -4.6%. 

Fiscal year: 2011; 
Federal surplus/deficit[A]: -3.7%; 
Combined surplus/deficit: -4.8%. 

Fiscal year: 2012; 
Federal surplus/deficit[A]: -3.8%; 
Combined surplus/deficit: -4.9%. 

Fiscal year: 2013; 
Federal surplus/deficit[A]: -4.2%; 
Combined surplus/deficit: -5.4%. 

Fiscal year: 2014; 
Federal surplus/deficit[A]: -4.6%; 
Combined surplus/deficit: -5.8%. 

Fiscal year: 2015; 
Federal surplus/deficit[A]: -4.81%; 
Combined surplus/deficit: -6.1%. 

Fiscal year: 2016; 
Federal surplus/deficit[A]: -5.2%; 
Combined surplus/deficit: -6.6%. 

Fiscal year: 2017; 
Federal surplus/deficit[A]: -5.5%; 
Combined surplus/deficit: -7%. 

Fiscal year: 2018; 
Federal surplus/deficit[A]: -5.8%; 
Combined surplus/deficit: -7.3%. 

Fiscal year: 2019; 
Federal surplus/deficit[A]: -5.9%; 
Combined surplus/deficit: -7.5%. 

Fiscal year: 2020; 
Federal surplus/deficit[A]: -6.2%; 
Combined surplus/deficit: -7.8%. 

Fiscal year: 2021; 
Federal surplus/deficit[A]: -6.5%; 
Combined surplus/deficit: -8.2%. 

Fiscal year: 2022; 
Federal surplus/deficit[A]: -7%; 
Combined surplus/deficit: -8.8%. 

Fiscal year: 2023; 
Federal surplus/deficit[A]: -7.4%; 
Combined surplus/deficit: -9.3%. 

Fiscal year: 2024; 
Federal surplus/deficit[A]: -8%; 
Combined surplus/deficit: -9.9%. 

Fiscal year: 2025; 
Federal surplus/deficit[A]: -8.5%; 
Combined surplus/deficit: -10.4%. 

Fiscal year: 2026; 
Federal surplus/deficit[A]: -9%; 
Combined surplus/deficit: -11.1%. 

Fiscal year: 2027; 
Federal surplus/deficit[A]: -9.5%; 
Combined surplus/deficit: -11.7%. 

Fiscal year: 2028; 
Federal surplus/deficit[A]: -10.1%; 
Combined surplus/deficit: -12.2%. 

Fiscal year: 2029; 
Federal surplus/deficit[A]: -10.6%; 
Combined surplus/deficit: -12.91%; 

Fiscal year: 2030; 
Federal surplus/deficit[A]: -11.3%; 
Combined surplus/deficit: -13.6%. 

Fiscal year: 2031; 
Federal surplus/deficit[A]: -11.9%; 
Combined surplus/deficit: -14.4%. 

Fiscal year: 2032; 
Federal surplus/deficit[A]: -12.4%; 
Combined surplus/deficit: -15%. 

Fiscal year: 2033; 
Federal surplus/deficit[A]: -13%; 
Combined surplus/deficit: -15.7%. 

Fiscal year: 2034; 
Federal surplus/deficit[A]: -13.6%; 
Combined surplus/deficit: -16.3%. 

Fiscal year: 2035; 
Federal surplus/deficit[A]: -14.2%; 
Combined surplus/deficit: -17%. 

Fiscal year: 2036; 
Federal surplus/deficit[A]: -4.85%; 
Combined surplus/deficit: -17.8%. 

Fiscal year: 2037; 
Federal surplus/deficit[A]: -15.3%; 
Combined surplus/deficit: -18.4%. 

Fiscal year: 2038; 
Federal surplus/deficit[A]: -16%; 
Combined surplus/deficit: -19.1%. 

Fiscal year: 2039; 
Federal surplus/deficit[A]: -16.5%; 
Combined surplus/deficit: -19.8%. 

Fiscal year: 2040; 
Federal surplus/deficit[A]: -17.2%; 
Combined surplus/deficit: -20.5%. 

Fiscal year: 2041; 
Federal surplus/deficit[A]: -17.8%; 
Combined surplus/deficit: -21.3%. 

Fiscal year: 2042; 
Federal surplus/deficit[A]: -18.4%; 
Combined surplus/deficit: -21.9%. 

Fiscal year: 2043; 
Federal surplus/deficit[A]: -19%; 
Combined surplus/deficit: -22.7%. 

Fiscal year: 2044; 
Federal surplus/deficit[A]: -19.6%; 
Combined surplus/deficit: -23.4%. 

Fiscal year: 2045; 
Federal surplus/deficit[A]: -20.3%; 
Combined surplus/deficit: -24.1%. 

Fiscal year: 2046; 
Federal surplus/deficit[A]: -20.9%; 
Combined surplus/deficit: -24.8%. 

Fiscal year: 2047; 
Federal surplus/deficit[A]: -21.6%; 
Combined surplus/deficit: -25.6%. 

Fiscal year: 2048; 
Federal surplus/deficit[A]: -22.29%; 
Combined surplus/deficit: -26.4%. 

Fiscal year: 2049; 
Federal surplus/deficit[A]: -22.9%; 
Combined surplus/deficit: -27.2%. 

Fiscal year: 2050; 
Federal surplus/deficit[A]: -23.6%; 
Combined surplus/deficit: -28%. 

Source: GAO’s September 2008 analysis. 

[A] Under GAO's Alternative simulation based on the Trustees' 
assumptions. 

[End of figure] 

As we have noted elsewhere, the expected continued rise in health care 
costs poses a fiscal challenge not just to government budgets, but to 
American business and society as a whole.[Footnote 6] In short, the 
fundamental fiscal problems facing all levels of government are similar 
and are linked. As such, solutions to address these challenges should 
be considered in tandem. 

The Fiscal Gap--Another Way to Measure the Challenge: 

There are many ways to measure the long-term fiscal challenge. One 
quantitative measure is called the fiscal gap. The fiscal gap is the 
amount of spending reduction or tax increases that would be needed to 
keep debt as a share of GDP at or below today's ratio. In contrast to 
balancing the budget in a particular year, such as in 2040 as described 
on page 2, the fiscal gap is an estimate of the action needed to 
achieve fiscal balance over a certain time period, such as 75 years. 
Another way to say this is that the fiscal gap is the amount of change 
needed to prevent the kind of debt explosion implicit in figure 1. The 
fiscal gap can be expressed as a share of the economy or in present-
value dollars. (See table 1.) 

Table 1: Federal Fiscal Gap under GAO's Simulations Based on the 
Trustees' Assumptions, 2008-2082: 

Baseline Extended: 
Fiscal gap, Trillions of 2008 dollars: $31.3; 
Fiscal gap, Percent of GDP: 3.9%; 
Change required to close gap compared to today's levels, Percent 
increase in revenue: 21.8%; 
Change required to close gap compared to today's levels, Percent 
increase in individual 
income taxes: 47.7%; 
Change required to close gap compared to today's levels, Percent 
decrease in noninterest spending: 20.5%. 

Alternative: 
Fiscal gap, Trillions of 2008 dollars: $56.1; 
Fiscal gap, Percent of GDP: 7.0%; 
Change required to close gap compared to today's levels, Percent 
increase in revenue: 39.1%; 
Change required to close gap compared to today's levels, Percent 
increase in individual 
income taxes: 85.6%; 
Change required to close gap compared to today's levels, Percent 
decrease in noninterest spending: 36.6%. 

Source: GAO analysis. 

[End of table] 

To put this in perspective, the fiscal gap under Baseline Extended 
could be closed by an increase in today's revenue of about 22 percent 
or a 21 percent reduction in today's programmatic spending maintained 
over the entire period. Under our Alternative simulation, the required 
action would be even more dramatic--about 39 percent of today's taxes 
or 37 percent of today's spending. Policymakers could phase in the 
policy changes so that the tax increases or spending cuts would grow 
over time and allow people to adjust. However, delaying action would 
require larger changes. Under our Alternative simulation, waiting even 
10 years would require a revenue increase of about 48 percent or 
noninterest spending cuts of 41 percent. 

This gap is too large to simply grow out of the problem. To be sure, 
additional economic growth would help the nation's financial condition 
and the ability to address the fiscal gap, but it will not eliminate 
the need for action. 

Key Assumptions in Our Federal Simulations: 

Simulations are not forecasts or predictions. They are designed to ask 
the question "what if?" Our "what ifs" include what if discretionary 
spending is lower than the 20-year historical average and revenue 
higher than the historical average (as in Baseline Extended) or nearly 
at the historical averages (as in the Alternative). The two simulations 
illustrate a range of possible outcomes based on different policy 
decisions for the long-term budget outlook. Although the timing of 
deficits and the resulting debt buildup varies depending on the 
assumptions used, both simulations show that the federal government is 
on an unsustainable fiscal path. 

The first simulation, Baseline Extended, follows CBO's September 
baseline for the first 10 years: tax provisions that are scheduled to 
expire are assumed to do so (including the temporary increase in the 
alternative minimum tax [AMT] exemption amount) and discretionary 
spending is assumed to grow with inflation. The Medicare estimates in 
this simulation assume the continuation of current law, under which 
fees for physicians treating Medicare patients would be cut in future 
years.[Footnote 7] At the end of the 10-year period, revenues in 
Baseline Extended are at 20.4 percent of GDP--a couple of points above 
the 20-year historical average. Discretionary spending is at 6.8 
percent of GDP--somewhat below the 20-year historical average of 7.6 
percent of GDP. For the remainder of the simulation period, levels of 
revenues and discretionary spending as shares of GDP are held constant. 

CBO's baseline is not a forecast of future outcomes; rather, it is 
based on the assumption that current laws and policies remain the 
same.[Footnote 8] As such, we change some assumptions in our 
Alternative simulation to reflect historical trends and recent policy 
preferences. Under the Alternative scenario in the first 10 years we 
assume that all expiring tax provisions are extended and that the 2007 
exemption amount for the AMT is continued but not indexed for 
inflation. After the first 10 years we bring revenues to their 
historical share of the economy--18.3 percent--plus expected revenues 
from deferred taxes (i.e., taxes on withdrawals from retirement 
accounts). Discretionary spending grows with the economy throughout the 
simulation period--it remains at 7.9 percent of GDP. This means that 
over the long term discretionary spending is within the range of 
historical averages. In addition, in the Alternative scenario we assume 
that payment rates to physicians will not be reduced as specified under 
current law and in CBO's baseline.[Footnote 9] 

We use two different sources for long-term projections of Social 
Security, Medicare, and Medicaid. In the first set of simulations, 
Social Security and Medicare are based on the Trustees' 2008 estimates. 
Medicaid spending is based on CBO's projections but adjusted to reflect 
excess cost growth consistent with the Trustees. Table 2 lists the key 
assumptions incorporated in the Baseline Extended and Alternative 
simulations for the simulations based on the Trustees' assumptions. In 
the second set of simulations, we use CBO's projections for Social 
Security, Medicare, and Medicaid. Table 3 shows the assumptions that 
differ from those shown in table 2. 

Table 2: Assumptions for Baseline Extended and Alternative Simulations 
Based on the Trustees' Assumptions for Social Security and Medicare: 

Model inputs: Revenue; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter remains constant at 20.4 percent of GDP; (CBO's projection 
in 2018); 
Alternative: All expiring tax provisions are extended through 2018; 
thereafter equal to 40-year historical average of 18.3; percent of GDP 
plus revenue from tax-deferred retirement plans. 

Model inputs: Social Security spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter based on 2008 Social Security Trustees' intermediate 
projections; 
Alternative: Same as Baseline Extended. 

Model inputs: Medicare spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter 2008 Medicare Trustees' intermediate; projections that 
assume per enrollee Medicare; spending grows on average 1 percent 
faster than; GDP per capita over the long term; 
Alternative: 2008 Trustees' intermediate projections adjusted for the; 
Centers for Medicare & Medicaid Services' (CMS) alternative assumption 
of 0 percent physician payment rate updates in the first 10 years. 

Model inputs: Medicaid spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter CBO's December 2007 long-term; projections adjusted to 
reflect excess cost growth; consistent with the 2008 Medicare 
Trustees' intermediate projections; 
Alternative: Same as Baseline Extended. 

Model inputs: Other mandatory spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter remains constant as a share of GDP at; 2.0 percent of GDP 
(i.e., increases at the rate of; economic growth); 
Alternative: Baseline Extended through 2011, then adjusted for; 
extension of certain tax credits through 2018; thereafter; remains 
constant at 2.1 percent of GDP. 

Model inputs: Discretionary spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter remains constant at 6.8 percent of GDP; 
Alternative: Increases at the rate of economic growth starting after; 
2008 (i.e., remains constant at 7.9 percent of GDP). 

Source: GAO analysis. 

[End of table] 

Table 3: Key Assumptions Underlying GAO's Simulations Using CBO's 
Entitlement Spending Projections: 

Model inputs: Social Security spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter CBO's August 2008 projections that assume full benefits as 
calculated under current law are paid regardless of the amounts 
available in the trust funds. These projections are based on the 2008 
Social Security Trustees' demographic projections and CBO's own 
economic assumptions; 
Alternative: Same as Baseline Extended. 

Model inputs: Medicare spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter CBO's December 2007 projections based on current law. Per 
enrollee Medicare spending grows on average 1.7 percentage points 
faster than GDP per capita over the long term; 
Alternative: CBO's projections that assume physician payment rates grow 
with inflation (using the Medicare economic index [MEI])[A]. 

Model inputs: Medicaid spending; 
Baseline Extended: CBO's September 2008 baseline through 2018; 
thereafter CBO's December 2007 long-term projections based on current 
law. Per enrollee Medicaid spending grows on average 0.9 percentage 
points faster than GDP per capita over the long term; 
Alternative: Same as Baseline Extended. 

Source: GAO analysis. 

Notes: CBO's projections are from Updated Long-Term Projections for 
Social Security (August 2008) and The Long-Term Budget Outlook 
(December 2007). 

[A] This is slightly higher than the assumption used in GAO's 
alternative using the Trustees' assumptions. In the Trustees' analysis, 
expenditures under the MEI-based update are 22.5 percent higher than 
current law by 2017, whereas expenditures under the 0 percent update 
are only 16.8 percent higher. 

[End of table] 

A more detailed description of the federal model and key assumptions 
can be found at [hyperlink, http://www.gao.gov/special.pubs/longterm/]. 
Details on the state and local fiscal model can be found in appendix I 
of State and Local Governments: Growing Fiscal Challenges Will Emerge 
during the Next 10 Years.[Footnote 10] 

We conducted this work from September through October 2008 in 
accordance with generally accepted government auditing standards. Those 
standards require that we plan and perform the audit to obtain 
sufficient, appropriate evidence to provide a reasonable basis for our 
findings and conclusions based on our audit objectives. We believe that 
the evidence obtained provides a reasonable basis for our findings and 
conclusions based on our audit objectives. 

[End of section] 

Footnotes: 

[1] The excess health care cost growth assumption for Medicaid is also 
based on the Trustees' assumptions, but the base amount of Medicaid 
spending is based on CBO's projections. 

[2] More information on the assumptions underlying our simulations is 
on pp. 10-14. 

[3] CBO's September 2008 projections can be accessed at [hyperlink, 
http://www.cbo.gov/budget/budproj.shtml]. 

[4] Discretionary spending refers to spending from budget authority 
provided in appropriations acts. Mandatory spending refers to spending 
resulting from budget authority that is provided in laws other than 
appropriations acts. Mandatory spending includes entitlement 
authority, which requires the federal government to make payments to 
eligible beneficiaries, and authority that otherwise obligates the 
government to make payments. 

[5] GAO, State and Local Governments: Growing Fiscal Challenges Will 
Emerge during the Next 10 Years, [hyperlink, http://www.gao.gov/cgi-
bin/getrpt?GAO-08-317] (Washington, D.C.: January 
2008) and State and Local Governments: Persistent Fiscal Challenges 
Will Likely Emerge within the Next Decade, [hyperlink, 
http://www.gao.gov/cgi-bin/getrpt?GAO-07-1080SP] (Washington, 
D.C.: July 18, 2007). 

[6] For example, see GAO, Highlights of a Forum: Health Care 20 Years 
From Now--Taking Steps Today to Meet Tomorrow's Challenges, [hyperlink, 
http://www.gao.gov/cgi-bin/getrpt?GAO-07-1155SP] (Washington, D.C.: 
September 2007). 

[7] Under the sustainable growth rate system and in CBO's baseline, 
physician payment rates are projected to be reduced by about 21 percent 
in 2010 and more each year thereafter. The Trustees noted in their 2008 
report that Congress is virtually certain to prevent some or all of the 
scheduled reductions. 

[8] The Balanced Budget and Emergency Deficit Control Act of 1985, 
which established rules that govern the calculation of CBO's baseline, 
expired on September 30, 2006. CBO continues to prepare baselines 
according to the methodology prescribed in that law. 

[9] This reflects the fact that Congress has generally acted to prevent 
payment rates from being reduced. The Centers for Medicare & Medicaid 
Services (CMS) developed two illustrative Medicare estimates that vary 
from the intermediate estimates. One set of estimates assumes a 0 
percent update to physician fees; the other assumes updates for medical 
inflation. Our Alternative simulation based on the Trustees' 
assumptions uses the 0 percent update estimates. For more information 
on these estimates, see CMS's March 2008 memorandum, "Projected 
Medicare Part B Expenditures under Two Illustrative Scenarios with 
Alternative Physician Payment Updates," available at [hyperlink, 
http://www.cms.hhs.gov/ReportsTrustFunds/05_alternativePartB.asp]. 

[10] [hyperlink, http://www.gao.gov/cgi-bin/getrpt?GAO-08-317]. 

[End of section] 

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