Even a broken clock is right twice a day. With the wealth disparity today being worse than during the robber baron days of the 1890s, something needs to be done to disrupt the billionaires from hoarding wealth at the expensive of everyone else.
Id favor a cap on individual income of $10 million per year (including all capital gains too). If you are making more than $10 million a year then either you are making an obscene profit by ripping off others or not spending your money to keep the economy productive for everyone (more likely billionaires are doing both). Any income in excess of $10 million goes straight to treasury as income tax. Spend it or send it to Washington.
But since no politician will levy an income cap, Im willing to see what State Capitalism will do. If done correctly, maybe it could ensure no one in America goes hungry or homeless. The traditional way out of this kind of wealth inequity is blood-in-the-streets revolution, and no sane person wants that.
At the end of a monopoly game, theres only one winner everyone else loses.