ONE OF THE TRUISMS OF DEMOCRATIC SOCIETY IS THAT "to govern is to choose." Regardless of how rich our nations have become, we can't have everything-either as individuals or as societies. But we still do not know what we cannot have. Desires are infinite; resources are finite. Is it impossible, for example, to have the best, most technologically advanced health care rapidly available to all citizens without bankrupting the average taxpayer? Is it possible...