The growth of income inequality of the last 5 years is primarily being driven by the Federal Reserve.
You see the rich get their loans at 0.25% interest, that hedge funds can get use to gobble up large swathes of land and property and then charge us a much higher number on a mortgage, say 4-5%. You know what the difference between those two numbers are? It's called arbitrage, a basic concept of economics, and arbitrage enabled by the Fed is the primary driver of income inequality. Oh and what if you default on your mortgage you wonder, isn't the difference in rates because of risk the investors take? Well the Fed buys mortgage-backed securities. It has the rich covered. No risk profit, with none of the profits coming from increased productivity.