One of the top issues for U.S. voters is health care. There is a simple solution most of the world is smart enough to recognize but is lost on us: a single-payer system. There are two compelling reasons for a single-payer system. The first is the moral argument that health care security is a right for all of us. The second is a little more complicated, and that is health care economics. Sadly, most Americans do not understand this aspect of the health care debate and how it adversely affects them. Anthem announced its first-quarter profits to be $1.31 billion....