The economics of soaking the rich

What does Alexandria Ocasio-Cortez know about tax policy? A lot. It concerns Peter Diamond, one of our leading experts on inequality, who estimated the optimal top tax rate to be 73 percent. nytimes.com

I have no idea how well Alexandria Ocasio-Cortez will perform as a member of Congress. But her election is already serving a valuable purpose. You see, the mere thought of having a young, articulate, telegenic nonwhite woman serve is driving many on the right mad — and in their madness they’re inadvertently revealing their true selves.

Some of the revelations are cultural: The hysteria over a video of AOC dancing in college says volumes, not about her, but about the hysterics. But in some ways the more important revelations are intellectual: The right’s denunciation of AOC’s “insane” policy ideas serves as a very good reminder of who is actually insane.

The controversy of the moment involves AOC’s advocacy of a tax rate of 70-80 percent on very high incomes, which is obviously crazy, right? I mean, who thinks that makes sense? Only ignorant people like … um, Peter Diamond, Nobel laureate in economics and arguably the world’s leading expert on public finance. (Although Republicans blocked him from an appointment to the Federal Reserve Board with claims that he was unqualified. Really.) And it’s a policy nobody has ever implemented, aside from … the United States, for 35 years after World War II — including the most successful period of economic growth in our history.

To be more specific, Diamond, in work with Emmanuel Saez — one of our leading experts on inequality — estimated the optimal top tax rate to be 73 percent. Some put it higher: Christina Romer, top macroeconomist and former head of President Obama’s Council of Economic Advisers, estimates it at more than 80 percent.

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