In the book "Defrauding America", Rodney Stich tells how the Savings and Loan crisis of the 1980s-- which was a huge deal at the time-- was essentially a CIA scam. Basically, after Congress cut back on CIA funding in the late '70s, due to Congressional investigations and scandals, the CIA sought out new sources of funds for covert operations. Thus, the CIA took advantage of the recent laws that deregulated thrifts/savings and loans, and essentially set up scams to steal billions of dollars from the government, via S&L CIA fronts and bogus real estate deals. Charles Keating, the biggest name of the scandal, had extensive CIA ties.
While this may seem like ancient history now, doesn't it seem likely that the current financial crisis was a CIA scam-- particularly given ties between AIG and the CIA?
More details on the CIA and the S&L crisis here and here.
Gunther Russbacher, the "former" CIA agent who is the basis for much of this information, has a very bizarre, interesting history (with various contradictory information). See here, here, here. Strikingly, there is nothing on Russbacher or Stich in Wikipedia, despite their importance in the conspiracy world.