We know the pattern by now. A crisis arises. As my Competitive Enterprise Institute colleague Chris Horner puts it, this administration says, “There’s no time to waste, we must do something now, sign here, details to follow.” And every time, we discover that we have signed up for more than we bargained for. That was the case with the Dodd-Frank Act, passed in 2010 supposedly to solve the problems that caused the financial crisis. Only now are we seeing the details to follow. They amount to a government takeover of the financial industry and increased government control over our behavior,...