For Two Economists, the Buffett Rule Is Just a Start (Published 2012)

Research done by Emmanuel Saez, left, and Thomas Piketty has shown that inequality among the middle class and the rich is nearly as acute as it was before the Great Depression.Credit...Don Feria/Getty Images for The MacArthur Foundation Awards, left; Paris School of Economics WASHINGTON — High earners who are worried that this year’s Tax Day will be the last one before their rates rise have more t