http://www.huffingtonpost.com/robert-reich/obama-has-to-explain-why-_b_1542005.html   An excerpt from this excellent article by Robert Reich:   "The key reason why the recovery is so anemic is that so much income and wealth are now concentrated at the top is America's the vast middle class no longer has the purchasing power necessary to boost the economy.   The richest 1 percent of Americans save…