A (hopefully) non-partisan question:
Is anyone aware of any evidence that any action by any branch of government has ever had any effect on the economy whatsoever? Has anyone ever actually done a correlation analysis with a proper null hypothesis ("no effect"), etc?
Not a rhetorical question. I really want to know.
Edited to add:
Oh, and an answer along the lines of "Well, in 19XX, after Congress passed the Wah-Wah Economic bill, the Whatever Index went up by XX%." doesn't cut it. You have no way of knowing whether that would have happened anyway. I think it'd take some kind of statistical analysis over the long term to really get an answer...