Every once in a while, people in Washington have a good idea. A really good idea. An idea that creates jobs and provides a service people like. Then, the government gets involved. Some years ago, a married couple, Taalib-Din Uqdah and Pamela Farrell, went into business braiding hair, African-style. They called their shop Cornrows & Co. If politicians' speeches are right, Uqdah and Farrell were heroes: Inner cities need businesses, and the couple had built a booming business in Washington, D.C. They had 20,000 customers, employed 10 people and took in half a million dollars a year. Some women came...