Paul Krugman: Inequality Is a Drag

For more than three decades, almost everyone who matters in American politics has agreed that higher taxes on the rich and increased aid to the poor have hurt economic growth.

Liberals have generally viewed this as a trade-off worth making, arguing that it’s worth accepting some price in the form of lower G.D.P. to help fellow citizens in need. Conservatives, on the other hand, have advocated trickle-down economics, insisting that the best policy is to cut taxes on the rich, slash aid to the poor and count on a rising tide to raise all boats.