In our chapter on economic policy, we discuss the growing federal deficit and debt. The
Congressional Budget Office explains the possible consequences:
Although deficits during or shortly after a recession generally hasten economic recovery, persistent deficits and continually mounting debt would have several negative economic consequences for the United States. Some of those consequences would arise gradually: A growing portion of people’s savings would go to purchase government debt rather than toward investments in productive capital goods such as factories and computers; that “crowding out” of investment would lead to lower output and incomes than would otherwise occur. In addition, if the payment of interest on the extra debt was financed by imposing higher marginal tax rates, those rates would discourage work and saving and further reduce output. Rising interest costs might also force reductions in spending on important government programs. Moreover, rising debt would increasingly restrict the ability of policymakers to use fiscal policy to respond to unexpected challenges, such as economic downturns or international crises.
Beyond those gradual consequences, a growing level of federal debt would also increase the probability of a sudden fiscal crisis, during which investors would lose confidence in the government’s ability to manage its budget, and the government would thereby lose its ability to borrow at affordable rates. It is possible that interest rates would rise gradually as investors’ confidence declined, giving legislators advance warning of the worsening situation and sufficient time to make policy choices that could avert a crisis. But as other countries’ experiences show, it is also possible that investors would lose confidence abruptly and interest rates on government debt would rise sharply. The exact point at which such a crisis might occur for the United States is unknown, in part because the ratio of federal debt to GDP is climbing into unfamiliar territory and in part because the risk of a crisis is influenced by a number of other factors, including the government’s long-term budget outlook, its near-term borrowing needs, and the health of the economy. When fiscal crises do occur, they often happen during an economic downturn, which amplifies the difficulties of adjusting fiscal policy in response.
