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.
Where do these numbers come from? Underlying the Diamond-Saez analysis are two propositions: Diminishing marginal utility and competitive markets.
Diminishing marginal utility is the common-sense notion that an extra dollar is worth a lot less in satisfaction to people with very high incomes than to those with low incomes. Give a family with an annual income of $20,000 an extra $1,000 and it will make a big difference to their lives. Give a guy who makes $1 million an extra thousand and he'll barely notice it.
An aside: What if we take into account the reality that markets aren't perfectly competitive, that there's a lot of monopoly power out there? The answer is that this almost surely makes the case for even higher tax rates, since high-income people presumably get a lot of those monopoly rents.
So AOC, far from showing her craziness, is fully in line with serious economic research. (I hear that she's been talking to some very good economists.) Her critics, on the other hand, do indeed have crazy policy ideas — and tax policy is at the heart of the crazy.
You see, Republicans almost universally advocate low taxes on the wealthy, based on the claim that tax cuts at the top will have huge beneficial effects on the economy. This claim rests on research by … well, nobody. There isn't any body of serious work supporting G.O.P. tax ideas, because the evidence is overwhelmingly against those ideas.
https://nyti.ms/2GUnmWB
I really never thought I'd see "marginal utility" outside of a microecon class.
