The US economy depends on those tech companies: try succeeding in a country that only has old school businesses: I remember the top stocks for France are terrifyingly old. I'm in New Zealand and we hardly have any tech stocks. Xero, RocketLabs? We often sell our successes overseas.
Edit: many of https://en.wikipedia.org/wiki/List_of_wealthiest_Americans_b... are founders. Looking at: https://en.wikipedia.org/wiki/List_of_French_billionaires_by... and too many of the businesses are over a century old, more than a few from the 1800s.
Edit: The irony of rich Americans talking about wealth inequality is harsh. There's billions of people that desperately want the resources that a poor US citizen spends. If you are American and want to talk about the wealthy, look at yourself and ask how your wealth should be taken from you and given to the poor of the world...