J. Bradford DeLong, Professor of Economics at the University of California, Berkeley, is a research associate at the National Bureau of Economic Research and the author of Slouching Towards Utopia: An Economic History of the Twentieth Century (Basic Books, 2022). He was Deputy Assistant US Treasury Secretary during the Clinton Administration, where he was heavily involved in budget and trade negotiations. His role in designing the bailout of Mexico during the 1994 peso crisis placed him at the forefront of Latin America’s transformation into a region of open economies, and cemented his stature as a leading voice in economic-policy debates.
BERKELEY – Via a circuitous Internet chain – Paul Krugman of Princeton University quoting Mark Thoma of the University of Oregon reading the Journal of Economic Perspectives – I got a copy of an article written by Emmanuel Saez, whose office is 50 feet from mine, on the same corridor, and the Nobel laureate economist Peter Diamond. Saez and Diamond argue that the right marginal tax rate for North Atlantic societies to impose on their richest citizens is 70%.
It is an arresting assertion, given the tax-cut mania that has prevailed in these societies for the past 30 years, but Diamond and Saez’s logic is clear. The superrich command and control so many resources that they are effectively satiated: increasing or decreasing how much wealth they have has no effect on their happiness. So, no matter how large a weight we place on their happiness relative to the happiness of others – whether we regard them as praiseworthy captains of industry who merit their high positions, or as parasitic thieves – we simply cannot do anything to affect it by raising or lowering their tax rates.
The unavoidable implication of this argument is that when we calculate what the tax rate for the superrich will be, we should not consider the effect of changing their tax rate on their happiness, for we know that it is zero. Rather, the key question must be the effect of changing their tax rate on the well-being of the rest of us.
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