If economic growth is as simple as throwing $787 billion down the well, why not do it all the time?

And boatloads of empirical evidence shows that Keynesian ideas are bad ideas. Devout Keynesian Paul Krugman declared that the 9/11 rebuilding in NYC was a "positive" for the economy, apparently ignoring that billions in wealth was destroyed to make way for that "prosperity". Pretty sad that a trained economist doesn't even understand the broken window fallacy.