Russell Roberts, professor of economics at George Mason University, wrote a fantastic paper on the causes of the financial crisis.
The most culpable policy has been the systematic encouragement of imprudent borrowing and lending. That encouragement came not from capitalism or markets, but from crony capitalism, the mutual aid society where Washington takes care of Wall Street and Wall Street returns the favor.9 Over the last three decades, public policy has systematically reduced the risk of making bad loans to risky investors. Over the last three decades, when large financial institutions have gotten into trouble, the government has almost always rescued their bondholders and creditors. These policies have created incentives both to borrow and to lend recklessly.