Sustained Budget Deficits: Longer-Run U.S. Economic Performance and the Risk of Financial and Fiscal Disarray

The U.S. federal budget is on an unsustainable path. In the absence of significant policy changes, federal government deficits are expected to total around $5 trillion over the next decade. Such deficits will cause U.S. government debt, relative to GDP, to rise significantly. Thereafter, as the baby boomers increasingly reach retirement age and claim Social Security and Medicare benefits, government deficits and debt are likely to grow even more sharply. The scale of the nation's projected budgetary imbalances is now so large that the risk of severe adverse consequences must be taken very seriously, although it is impossible to predict when such consequences may occur. Conventional analyses of sustained budget deficits demonstrate the negative effects of deficits on long-term economic growth. Under the conventional view, ongoing budget deficits decrease national saving, which reduces domestic investment and increases borrowing from abroad.1 Interest rates play a key role in how the economy adjusts. The reduction in national saving raises domestic interest rates, which dampens investment and attracts capital from abroad.2 The external borrowing that helps to finance the budget deficit is reflected in a larger current account deficit, creating a linkage between the budget deficit and the current account deficit. The reduction in domestic investment (which lowers productivity growth) and the increase in the current account deficit (which requires that more of the returns from the domestic capital stock accrue to foreigners) both reduce future national income, with the loss in income steadily growing over time. Under the conventional view, the costs imposed by sustained deficits tend to build gradually over time, rather than occurring suddenly.download