We are now in the season of scapegoats. The brays for justice and villains grow daily, and this week has seen a walk of shame as various participants in the credit debacle sit in front of Congress to be scolded and upbraided for their sins. Many of the goats today, and none more than former Chairman of the Federal Reserve Alan Greenspan, were heroes only a short while ago - yet another vivid illustration of the ancient words of the mythical king Croesus: “Count no man happy till he’s dead,” or to put it another way, “it ain’t over till it’s over.”