>>>Let's have a 90% federal inheritance taxes on estates over, say, $20,000,000.
>>>Sure, they will be evaders, but we'll get a lot of it, as we used to before Reagan came along.
>
>High death duties have a checkered history. Many/most jurisdictions removed them.

Exactly, and that is the problem.
Left unchecked, governments fixated on capitalism inevitably become oligarchic and favor the very rich.
The reforms of TR and FDR have been all but erased.
This country has worshiped at the altar of wealth and private property since its inception.

Here's a real shocker I came across recently:
https://www.nytimes.com/2019/04/16/opinion/when-slaveowners-got-reparations.html

Just let that one sink a little.

Did you notice how KG evoked the Soviet menace when saying that someone was talking about taking his property?
Here's another shocker:
My wealth and KG's only belong to us because the respective government levels say they do.
Further, they protect our rights to that wealth with armed force if necessary.
If they didn't we'd lose the wealth in heartbeat.
No Soviet menace there, is there?