"Some mechanism" is called simply taxation. In 1944, the top income tax bracket in the USA was 94 %. Nowadays you'd also need a wealth tax to deal with the perverse incentives caused by past accumulation of stock.

https://en.wikipedia.org/wiki/Income_tax_in_the_United_State...

https://www.newyorker.com/magazine/2020/03/09/thomas-piketty...