Which is why fiscal stimulus is temporary. It's necessary while the economy is at less than full employment, but once the economy starts picking up fiscal stimulus should drop off.
That's the cover story. But how much of the $819 billion in the stimulus bill is set to automatically expire in 2 years, or when the economy reaches certain growth targets? Roughly: none. A lot of the spending won't even get flowing until 2010 or 2011, when the economy may be recovering just fine on its own.