Posner looks at possible post-recession fiscal pain:
The government has created a great deal of money, and borrowed a great deal of money, to finance the bailouts and the stimulus package and increase the amount of money in circulation (to help push down interest rates). If when demand rises the banks lend their $800-plus billion in excess reserves, the ratio of money in circulation to the output of goods and services is likely to rise--and this will mean inflation.
The ratio will rise further if the government decides to finance some of the huge additional debt that it is incurring as a result of its anti-depression expenditures by increasing the money supply, that is, by inflation, which is a form of taxation--taxation of cash balances. A low rate of inflation is manageable and does little economic harm, but a high rate is very harmful, and can be broken usually only at the cost of a sharp recession (consequent upon a sharp rise in interest rates in order to reduce the amount of lending and hence the amount of money in circulation). And the recession might (as in 1937) disrupt a recovery from the depression. These costs have to balanced against the benefits of the anti-depression programs; unfortunately only guesses are possible.