Larry Summers hates this, and, given that I lose three of four arguments I have with him, that is a sign that I may well be wrong here. Maybe it is that I spend too much time back in the eighteenth century, and do not understand modern public finance. Maybe it is just that we upper middle class urban Californians pay huge wealth taxes, and so don't see why others think it is a big deal. But it seemed and seems to me that whether one taxes wealth, income, or consumption in order to try to minimize the utility cost of taxation by placing burdens on those with a very low marginal utility of wealth is overwhelmingly a question of administrative practicality: how to identify those with a low marginal utility of wealth:
Isn't a Wealth Tax Common Sense? https://www.project-syndicate.org/commentary/wealth-tax-common-sense-by-j-bradford-delong-2020-01: I was not surprised when Gabriel Zucman and Emmanuel Saez https://www.brookings.edu/wp-content/uploads/2019/09/Saez-Zucman_conference-draft.pdf in offices down the hall and Thomas Piketty over in Paris began proposing, and Democratic presidential candidates began endorsing https://www.vox.com/policy-and-politics/2019/1/24/18196275/elizabeth-warren-wealth-tax https://www.vox.com/policy-and-politics/2019/9/24/20880941/bernie-sanders-wealth-tax-warren-2020, the idea of a “wealth tax“. What did surprise me was what seemed and still seems to be a surprising amount of unexpected pushback—pushback from people I had always thought to be on the side of a more-progressive rationalization of the tax system.
Back up: When I learned public finance, I was taught that there were three principles of taxation, all spring from Jean-Baptiste Colbert‘s observation that the point was to extract the feathers from the goose with the least amount of hissing. That meant, first, always broadening the tax base so that you could hit your revenue target with the lowest possible and hence the least annoying tax rates. That meant, second, imposing taxes on items for which demand was inelastic, so that the tech system did as little as possible destructive distortion to the pattern of economic activity. That meant, third, taxing those for whom the utility cost of their tax payments was least—that is, taxing the rich. And what is the broadest possible tax base on which to tax the wealthy? It is their wealth, of course. And for what is the demand of the wealthy least elastic—what are they least willing to sacrifice to try to reduce their tax burden? Their wealth, of course.