Earlier quoted context omitted.
> The people behind wealth taxes generally handwave explaining how their system will be better at allocating than the people who make a living of allocating wealth effectively because it is all just obvious that it doesn't need to be justified. Poor people will get more money if rich people have less, duh, QED. Even your straw man version of this argument is pretty convincing to me alongside graphs showing the extent…
> This is more a disagreement of values than facts, I think. It's a disagreement over policy. Increasing inequality is bad, the question is what's the best way to do something about it? There are many alternatives with better characteristics than a wealth tax, like antitrust enforcement to break up concentrated industries and lower corporate profits through increased competition, zoning reform to reduce housing costs…
I'm not at all sure everyone in these discussions agrees on this point!
I agree with you not only that this is bad but also that wealth taxes are not the only way to address it. They are a way that is getting momentum right now, AFAICT more than the other things you mentioned, and we may have to choose between voting for a wealth tax (or candidates who support one) or doing nothing.
fwiw, I'm really not sure which approach(es) I'd choose if I could single-handedly decide how to reduce wealth inequality.
> The high marginal rates in the mid-20th century were fake.
I think "federal receipts as a percent of GDP" isn't the right chart to answer this question. Overall tax rate != how progressive the tax is or how high the "effective" marginal tax rate is. On https://inequality.org/facts/wealth-inequality/ the "The Top .01% Don't Pay Their Fair Share as They Hoard More Wealth" shows a clear cross-over point where before about 1980 the top .01%'s share of tax was greater than their share of wealth, and after it reversed. That's consistent with the 1981 change I mentioned.