Just because their predictions were clearly retarded doesn't mean that a stimulus wasn't needed.

Even in a theoretical economy where the government gets $1 of GDP for every $1 it spends, trusting our government to spend the debt wisely is a bad bet.
EDIT: Also because of how much of economics is governed by perception
of economic fitness, overly optimistic predictions are a NECESSARY
thing for the government to give.
Fair enough, especially in our consumer driven economy. Still, what good is it to project optimism if it compels consumers to go into more debt? I understand the problem of deflation, and the government coming out and saying "HEY WERE GOING TO BE ******" would obviously make it worse, but it still sort of sucks to be lied to.