I agree with you. But, while not the same, it seems related that for example, the tax rate in the USA was a times as high as 94%
https://www.investopedia.com/articles/tax/10/history-taxes.a...
I don't know how well that was at limiting wealth. Maybe people found ways to hide the money so it didn't get taxed. It also didn't limit wealth. 6% of a trillion is still 60 billion