The income gap in New York City has gotten worse again. It's been particularly bad since the collapse of Enron and the 2001-2003 recession.
The most successful revolution of the past fifty years has been the "revolt of the haves". Between 1940 and 1970, taxes on the rich were very high. The marginal tax rate on incomes over $1,000,000 was at least 90%. Yet these were the years when the American economy grew steadily, and productivity gains were matched by solid increases in average wages and salaries, and a narrowing gap between the very rich and everyone else. So what happened? The Republican Party convinced millions of ordinary white Americans that black people were prospering off of them, and far too much money and effort was being diverted to the unworthy poor. By 1980, with the Pied Piper from California spinning his fantasies about out "bright, shining city on a hill", and how government was the problem, not the solution, the people were willing to buy the nonsense that massive tax cuts for the rich would translate into prosperity for all, as far as the eye could see. And here we are. The top 0.1% are taking in nearly ALL the additional GDP bring created by the economy. And Trump the simple wants MORE tax cuts, and yet less regulation! Sure, why not?