The idea that inequality will lead to lopsided political power hasn't yet been proven. If the 100 richest Americans decided who was president, it would be someone like Bill Gates or Michael Bloomberg -- not Donald Trump.
People who focus so much on inequality should rethink their priorities. Actually, living in a highly unequal economy is fine as long as:
1. Wealth is highly correlated to productivity
2. The poor have access to the necessities