WASHINGTON -- David Koch, one of the two celebrated Koch brothers known to millions of Americans who follow the news, passed away last Friday. He was 79. Now there is only one Koch brother to appear in the news. Yet the name Koch will be around for years. One sees the name frequently when business is being discussed, in discussions of the arts, in discussions of politics, particularly libertarian politics. Does anyone stop to wonder why the name Koch appears so frequently in the news? Well, I have had some experience with the Kochs, and I have an insight into...