"Perhaps the most stunning message from crisis history is the simply staggering rise in government debt most countries experience. Central government debt tends to rise over 85% in real terms during the first three years after a banking crisis. This would mean another $8 trillion or $9 trillion in the case of the U.S. Interestingly, the main reason why debt explodes is not the much ballyhooed cost of bailing out the financial system, painful as that may be. Instead, the real culprit is the inevitable collapse of tax revenues that comes as countries sink into deep and prolonged recession. Aggressive countercyclical fiscal policies also play a role, as we are about to witness in spades here in the U.S. with the passage of a more than $800 billion stimulus bill."