Over the past four-and-a-half decades, we have seen economic inequality return with a vengeance. We’re living through a new Gilded Age, comparable to the one at the turn of the 19th Century. The first Gilded Age was the age of Rockefeller and Carnegie; ours is the age of Bezos and Knight. The return of extreme wealth inequality is the result of public policy choices, not least decisions in how we tax the superrich.