IT'S THE SORT of behavior we have -- sadly -- come to expect from some in Congress. But when Gerhard Schroeder, the former German chancellor, announced last week that he was going to work for Gazprom, the Russian energy behemoth, he catapulted himself into a different league. It's one thing for a legislator to resign his job, leave his committee chairmanship and go to work for a company over whose industry he once had jurisdiction. It's quite another thing when the chancellor of Germany -- one of the world's largest economies -- leaves his job and goes to work for...