For some reasons why there's a breakdown in societies globally and increasing separation of people into upper and lower classes with fewer in the middle, read Rana Foroohar's "Makers and Takers" which details the financializing of capitalist economies, particularly the United States, caused by powerful industry lobbyists for the investment bankers influencing politicians to allow merging of Commercial Banking with Investment Banking, giving huge tax breaks to the wealthy, etc..
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Coming Apart