Many economists caution that:
- There are time lags in the use of fiscal policy, and that fiscal policy must be carefully employed if it is to result in less, rather than more, economic fluctuation.
- Recessionary gaps are so threatening that the government ought to always be ready to enact fiscal policy to counteract them.
- The existence of time lags makes the implementation of fiscal policy easier than it would be without the lags.
- Recessionary gaps are often over before fiscal policy has any impact, so the fiscal policy has no impact on the economy.