Editor's Note: There is an emerging argument for overcoming our ever-expanding polarization of wealth in the USA. It goes well beyond pleas for compassion from "bleeding hearts" like mine. That is, that income disparity is actually bad for our economy. David J. Lynch captures this theory and its principal promoter succinctly for Bloomberg Business Week below.
http://www.businessweek.com/magazine/how-inequality-hurts-the-economy-11162011.html