One of the many holes in the “social contract” theory of government is that the power of the state is so often harnessed by interest groups to protect themselves against competition. Nobody ever agreed to that, but it happens all the time, inflicting losses on the consuming public. A recent instance of this is the aggressive lobbying campaign being waged by the American Optometric Association (AOA) against innovations that now make it possible for Americans to get accurate eye exams and lens prescriptions over the Internet. By using such innovations, millions of Americans who need vision correction could save substantial...