Monetary policy is not going to help us out of this mess. Ben Bernanke has, belatedly, admitted as much. The Fed played an important role in creating the current conditions—by encouraging the bubble that led to unsustainable consumption—but there is now little it can do to mitigate the consequences. I can understand that its members may feel some degree of guilt. But anyone who believes that monetary policy is going to resuscitate the economy will be sorely disappointed. That idea is a distraction, and a dangerous one. What we need to do instead is embark on a massive investment program—as we did, virtually by accident, 80 years ago—that will increase our productivity for years to come, and will also increase employment now.