Digging a bit deeper.

20th Century solutions to 21st Century problems are like pushing on a string. The key to finding solutions to accelerating income and wealth inequality is to uncover the root cause. Capitalism relies on winners and losers in order to maximize economic utility. That machine will keep rolling on autopilot until we realize the fundamentals of economics have changed.

Open any Econ 101 textbook and look at the section on the supply/demand for human labour. It will tell you that the equilibrium point maximises employment at sustainable rates in a given sector. But when human labor is increasingly replaced by machines, AI, IOT, hyper connectivity, etc, the excess direct and indirect profit migrates in greater and greater volume to the owners of these substitutes for humans.

The solution is to rethink policy in the context of a broadly different supply/demand model for human labour. It may help to think of the world we are heading toward. When technology has reached it's end game and there is no longer need for human labour, profits will flow entirely to the 1% leaving none for the 99%