Angst targets Wal-Mart has become the whipping boy for political demagogues, unions and anti-traders. I suggest that they have the wrong target. The correct target is revealed by answering the question: "Why does Wal-Mart exist and prosper?” Wal-Mart exists and prospers because tens of millions of Americans find Wal-Mart to be a suitable source of goods and services. Hillary Clinton , Barack Obama , unions and anti-...