> but then that means other companies would appear in those other countries offering the AI inference service.

That might actually be the goal. A more fragmented market would mean each participant has less money, so they would try to watch their costs a bit more closely. The innovation rate (in non-cost-cutting areas) would probably decrease, maybe even substantially... which some people happen to consistently advocate for. A lot of lost efficiency would be reclaimed in a few years, but the whole system would be more stable, cheaper, and less centralized as a side effect.

Yeah, it would be suicidal to do that when it's your budget that gets the taxes from those giant corporations; who would want to willingly reduce their income for years? The rest of the world would benefit tremendously, but it could be a net plus (socially, politically, if not purely economically) in 5-7 years down the road - even in the country currently benefiting from the corporations the most. But that would be one to two lost elections too late, even if it turned true. So, while it won't happen, if it did, I don't believe we'd be worse for it.