First, here's a figure showing government demand or the "government sector" as a share of GDP. Total budgets for federal, state, and local government have been over one-third of GDP. But total government demand for goods and services has actually been falling. Here's Carroll's exposition:
"While it is true that the ratio of government expenditures—including federal, state, and local government—to GDP increased precipitously during the crisis (reaching 21.1 percent in 2009), it has been trending down sharply since. At 19.7 percent as of the fourth quarter of 2011, it has given back 70 percent of its post-crisis increase.
This downward trend is the result of decreasing shares at all levels of government; however, the most significant factor has been cuts at the state and local level. Unlike the federal government share, which currently sits at 15.7 percent, state and local government spending is now nearly 3 percent below its first-quarter 2007 level. Because state and local government accounts for about 60 percent of total government spending, the trend in this component has more weight than the federal component on the overall government share."
Carroll also provides a graphs of income transfers by government: again, in the breakdown of GDP into components of aggregate demand, these are allocated to the "consumption"category. Note that this graph isn't directly comparable to the one above, because it starts in 1997 rather than in 1970.
Several intriguing patterns emerge from these graphs:
1) I hadn't known that government spending on goods and services was actually higher in the much of the 1970s than it is today, nor that government demand for goods and services had such a big decline in the 1990s. For those who have a vision of government doing things like building roads, providing education and national defense, enforcing laws, and paying for research and development, government is doing less of those things as a share of the economy now than it was a few decades ago.
2) The recent rise in government transfer payments is extraordinarily large 4%: nearly 4% of GDP during the recent recession, or more than 5% of GDP if one compares from the peak of the business cycle in 2000 to the trough in 2009 and 2010. For comparison, total defense spending in 2011 was 4.7% of GDP. Thus, just rise in government transfer payments has been roughly comparable to total defense spending.
3) One way to look at the government budgets is that tax and other revenues pay for transfers, and borrowing pays for all government demand for goods and services. Carroll writes: ""[G]overnment as a component of GDP does not include transfers; however, transfers greatly exceed tax revenue and nearly exhaust total revenues. This leaves little funding to pay for government consumption and investment, and so the difference must be borrowed."