Greenspan was at the center of all the financial nonsense. May be the most naive and narrow minded of the Washington bunch. He ran the FED in a very libertarian manner and assumes that failure would be punished. By refusing to accept reality he created economic bubbles that the taxpayers were required to solve.
He still does not accept his major role in the mess.

It is a mistake to think businessmen are more immoral than politicians!
Keynes, 1937