This is C. Wright Mills banging on about a right-wing power elite in 1956, but "what about today's American society"?
C. Wright Mills (1916-62) talked about a 'new class' in America. As a leftist, he saw this 'power elite' as right-wing/conservative. It might surprise him, if he were around now, to discover that new ruling class is 'progressive'. We might call this power elite, which currently has the Clinton family at its core, the Left Power Elite (LPE). The LPE, from Wall Street to the Clinton Foundation and Hollywood celebrities, has commandeered America's capitalist democracy. Thus, it is spurious to talk about the FBI's "independence": http://ijr.com/2016/09/703663-fbi-director-let-hillary-off-the-hook-now-we-know-why-he-wouldnt-talk-about-the-clinton-foundation/