In capitalism, the wealthy provide the capex and reap the profit. In China, the government provides a lot of the capex and claims a lot of the profit (either directly or indirectly). They can then re-invest that, use it to set salaries free from market forces, etc.
The US could do more of that without getting into the contentious issue of raising personal taxes. Ie the government could control the flow of GPUs into the country, asserting that it had the right of first purchase, distribute them to a tightly controlled private company (think power or water company, with margins set by law), and probably make a profit on the cheaper hardware because they’d be a massive purchasing block. We won’t, though, because Google, Amazon, Oracle, etc are currently posed to make a _ton_ of money off doing basically the exact same thing.