Taxing billionaires is not some new and untested concept. In the US throughout the 1900’s the highest income tax brackets were often in the 70%'s, reaching into the 90%'s at times, and we did not see what you are suggesting.
Increasing the taxes on Gabe Newell’s profits from owning Valve would not suddenly cause him to lose money, just to gain less money. If corporate taxes and income taxes were increased across the board, then it is not as if he would benefit from selling Valve stock to invest elsewhere, and Valve would not be a more or less attractive place to invest relative to other options either. I am not sure why you think this would cause Gabe Newell to back out or investors to jump in. Heck, these rates have all changed pretty frequently within Valve’s existence and have not had a significant impact.
Also just to say, there is also the matter of jurisdiction as he lives in New Zealand while Valve is a US based company.






You’re just proposing a much more drastic and rapid change than I am. I agree that a wealth tax would be a more immediate effect. It is also much more drsstixnand far less tested. The idea is interesting and I am neither opposed to it nor calling for it. I do not think it it necessary.
Increasing income tax rates and corporate tax rates would be a much slower approach. I didn’t mention them, but I would also add in property tax rates and capital gains. Luxury sales taxes, inheritancd taxes. In the US, make OASDI a progressive instead of regressive tax.
For existing billionaires, there are plenty of laws they’ve already broken to get where they are that just need to be enforced. Wage theft, antitrust, union busting, fraud. The SEC should have buried Musk in a dungeon years ago. So I see the answer to eliminating existing wealth being fines rather than taxes.
Of course, there is also room to increase the minimum wage and minimum benefits. That would hell redistribute wealth too.
I don’t know Gabe Newell, or even anyone who works at Valve personally, but every account I have ever read about Valve is that they usually treated and paid their employees well. Investigate all of these megacorps and prosecute appropriately.