Yes but Akphi, I have discussed this before with you. One of the biggest flaws in Keyens economics is that is does not take a major factor into the equation which is human emotion.
The one example Keyesnsians point to as a success story for the United States is WW2. The only problem is, during that time people were in a much different mindset. Men were going to war to die, women were working to support the families, many just working for food vouchers. Could you imagine trying to convince people on welfare today that they have to work to get their food stamps? Laughable.
The economy is not free of human spirit. There are shit loads of money available, the stock market is going nuts. Then why is no one spending their money? Simple answer, fear. The fear of government tyranny and the demands of self preservation. When the economy was booming under Bush, there was a money spending and money making fever...I remember wondering "Why the fuck am I not buying and selling houses?" I had several friends who made bank doing this. And with every major transaction that took place, guess what...taxes were assessed.
You see, as a conservative, if Obama was to come out tomorrow and announce that income taxes were going to drop, and that they were going to cut welfare, social programs, gross military spending, bureaucratic bullshit, etc...I would rejoice, and so would most of the people of whom Obama despises..and I promise you, they would begin dropping their dollars on all kinds of shit.
This is a flaw in your theory. The theory works, just plugging in numbers, but it is self limiting. At some point, when the tipping point hits (the next crisis), we are going to be in deep, deep shit..and no amount of spending valueless money will matter.