In their book, Saez and Zucman sketch out a modern progressive tax code. The overall tax rate on the richest 1 percent would roughly double, to about 60 percent. The tax increases would bring in about $750 billion a year, or 4 percent of G.D.P., enough to pay for universal pre-K, an infrastructure program, medical research, clean energy and more. Those are the kinds of policies that do lift economic growth.

Added to my reading list.