Historically, prolonged extreme concentrations of wealth and outrageous income inequality tend to play out in two ways:
1) Violent Leftist/popular revolutions, such as the French Revolution, the Chinese Cultural Revolution, and the Russian Revolution.
2) The rise of a Fascist state, as the elites use “fear of the other” to gain support for policies that suppress freedom and democracy, and increase coercive control of the impoverished masses. Fascism never rises without support of the elites.
In the United States, with its strong pro-capitalist institutions and values, we’re more at risk for fascism than we are for violent Leftist revolution. There are strong currents of popular fascism in the racist, xenophobic blatherings of Glenn Beck and Rush Limbaugh. More and more our lawmakers are controlled by corporate interests. Disturbing incidents where police and military are used against U.S. citizens are on the rise.