Those with short-term memories have been dominating our debate over the future of the Consumer Financial Protection Bureau. They argue that the financial industry has learned its lesson and they point to a more rational marketplace today. But the Bureau was designed to regulate the subprime mortgage market and other consumer credit markets through the credit cycle. A strong Bureau should be built today to deal with the inevitable irrational exuberance of lenders and consumers once the cycle rises from its current depths to the heights of tomorrow.