That is true, but I think lots of capital is partially an effect rather than a cause. IE global investors would rather invest in a US startup or listed company

That is true, but I think lots of capital is partially an effect rather than a cause. IE global investors would rather invest in a US startup or listed company than a European or Canadian one. I think USA provides a good environment for companies where most other countries look after people first. One result is that people with skills that make money for companies will have above average salaries. The downsides of the American way are well documented.