Everything we get wrong about income inequality is that, in a modern economy that upholds basic laws against monopolistic and oligarchic power, it has anything to do with anything except fiat money.
There is a direct correlation between central bank financial repression (forcing unnaturally low interest rates upon the economy) and widening income inequality.
For insight into my assertion please read the open letter showing below the technical analysis at this link
If the assertion in your article was true, someone like Bloomberg could just fully fund, from dog catcher to president, every political campaign for every Democratic party candidate in the nation and thus buy political revolutions all the time. The amount of money spent in politics is actually quite small compared to the amount of private wealth out there. So the question begs, why don’t some billionaires do it?!