Economist Michael Hudson explains it all and more.
http://www.counterpunch.org/"The Treasury emphasized that it was under a Sunday afternoon deadline to finalize the takeover details before the Asian markets opened for trading. This concern reflects the balance-of-payments and hence military dimension to the bailout. The central banks of China, Japan and Korea are major holders of these securities. . .
Fannie and Freddie have been loading up on risky mortgages for ages, under-stating the risks largely to increase their stock price so that their CEOs can pay themselves tens of millions of dollars in salary and stock options. . .
The CEOs claimed to pay themselves for “innovation.” In today’s Orwellian vocabulary financial “innovation” means the creation of special rent-extracting privilege. The privilege was being able to get the proverbial “free ride” (that is, economic rent) by borrowing at low-interest government rates to buy and repackage mortgages to sell at a high-interest markup. Their “innovation” lies in the ambiguity that enabled them to pose as public-sector borrowers when they wanted to borrow at low rates, and private-sector arbitrageurs when they wanted to get a rake-off from higher margins.
The government’s auditors are now finding out that their other innovation was to cook the accounting books, Enron-style. As mortgage arrears and defaults mounted up, Fannie and Freddie did not mark down their mortgage holdings to realistic prices. They said they would do this in a year or so – by 2009, after the Bush Administration’s deregulators have left office. The idea was to blame it all on Obama when they finally failed."
Much more at link.