Overview
Several government agencies provide budget and debt data and analysis. These include the Government Accountability Office (GAO), the Congressional Budget Office, the Office of Management and Budget (OMB), and the U.S. Treasury Department.
These agencies have reported that the federal government is facing a series of critical long-term financing challenges. This is because expenditures related to entitlement programs such as Social Security, Medicare, and Medicaid are growing considerably faster than the economy overall, as the population grows older. These agencies have indicated that under current law, sometime between 2030 and 2040, mandatory spending (primarily Social Security, Medicare, Medicaid, and interest on the national debt) will exceed tax revenue.
In other words, all discretionary spending (e.g., defense, homeland security, law enforcement, education, etc.) will require borrowing and related deficit spending. These agencies have used such language as "unsustainable" and "trainwreck" to describe such a future.
The US debt in the hands of foreign governments was 25% of the total in 2007, virtually double the 1988 figure of 13%. Despite the declining willingness of foreign investors to continue investing in US dollar denominated instruments as the US dollar fell in 2007, the U.S. Treasury statistics indicate that, at the end of 2006, non-US citizens and institutions held 44% of federal debt held by the public.
Debt vs. US Dollar
A variety of factors are placing increasing pressure on the value of the U.S. dollar, increasing the risk of devaluation or inflation and encouraging challenges to dollar's role as the world's reserve currency. If another currency or basket of currencies replaced the dollar as the reserve currency, the U.S. would face higher interest rates to attract capital, reducing economic growth for the long-term.
The Economist wrote in May 2009: "Having spent a fortune bailing out their banks, Western governments will have to pay a price in terms of higher taxes to meet the interest on that debt. In the case of countries (like Britain and America) that have trade as well as budget deficits, those higher taxes will be needed to meet the claims of foreign creditors. Given the political implications of such austerity, the temptation will be to default by stealth, by letting their currencies depreciate. Investors are increasingly alive to this danger..."
About 66% of that 44% was held by the central banks of other countries, in particular the central banks of Japan and China. In May 2009, the US owed China $772 billion. In total, lenders from Japan and China held 44% of the foreign-owned debt. This exposure to potential financial or political risk should foreign banks stop buying Treasury securities or start selling them heavily was addressed in a recent report issued by the Bank of International Settlements which stated, "'Foreign investors in U.S. dollar assets have seen big losses measured in dollars, and still bigger ones measured in their own currency. While unlikely, indeed highly improbable for public sector investors, a sudden rush for the exits cannot be ruled out completely.
On May 20, 2007, Kuwait discontinued pegging its currency exclusively to the dollar, preferring to use the dollar in a basket of currencies. Syria made a similar announcement on June 4, 2007. In September 2009 China, India and Russia said they were interested in buying IMF gold to diversify their dollar-denominated securities.
Deficit Expansion
Key drivers of these risks relate to the unwillingness of the U.S. to live within its means, both from a budget deficit and trade deficit standpoint. For example, the Government Accountability Office (GAO), the Federal Government's auditor, argues that the U.S. is on a fiscally "unsustainable" path and that politicians and the electorate have been unwilling to change this path.
The 2010 U.S. budget indicates annual debt increases of nearly $1 trillion annually through 2019, with an unprecedented $1.0 trillion debt increase in 2009. By 2019 the U.S. national debt will be $18.4 trillion, approximately 148% of 2009 GDP, up from its approximately 80% level in April 2009. Further, the subprime mortgage crisis has significantly increased the financial burden on the U.S. government, with over $10 trillion in commitments or guarantees and $2.6 trillion in investments or expenditures as of May 2009, only some of which are included in the budget document.
Interest on Debt
Public debt owned by foreigners has increased to approximately 50% of the total or approximately $3.4 trillion. As a result, nearly 50% of the interest payments are now leaving the country, which is different from past years when interest was paid to U.S. citizens holding the public debt. Interest expenses are projected to grow dramatically as the U.S. debt increases and interest rates rise from very low levels in 2009 to more typical historical levels. CBO estimates that nearly half of the debt increases over the 2009-2019 period will be due to interest.
Net interest costs paid on the public debt declined from $260 billion in 2008 to $199 billion in 2009 because of lower interest rates. Should these rates return to historical averages, the interest cost would increase dramatically. Historian Niall Ferguson described the risk that foreign investors would demand higher interest rates as the U.S. debt levels increase over time in a November 2009 interview.
In 2008, $242 billion was spent on interest payments servicing the debt, out of a total tax revenue of $2.5 trillion, or 9.6%. Including non-cash interest accrued primarily for Social Security, interest was $454 billion or 18% of tax revenue.
The 2010 Budget
The 2010 Budget proposed by President Barack Obama projects significant debt increases, both in terms of dollars and relative to GDP. The debt is projected to nearly double to $20 trillion by 2015, but is expected to increase to nearly 100% of GDP by 2020 and remain at that level thereafter. These estimates assume real GDP growth (after inflation) ranging from 2.6% to 4.6% annually from 2010 through 2019, which exceeds Blue Chip consensus estimates.
-sources: wikipedia, us.gov, the economist, cbo, gao, omb