" The market might have learned a simple lesson: Don’t make loans to people who can’t repay them. Instead it learned a complicated one: You can keep on making these loans, just don’t keep them on your books. Make the loans, then sell them off to the fixed income departments of big Wall Street investment banks, which will in turn package them into bonds and sell them to investors. "

― Michael Lewis , The Big Short: Inside the Doomsday Machine