Part of the meta-game of academia is that feedback timelines are long enough that you can play the “wrong” meta-game and still come out ahead. If you don’t want a professorship — or are willing to settle for a super cushy “professor of practice” as an early retirement non-profit thing to keep ya out of the house — then a PhD can be a good place to do hard tech pre-seed work.
In 2021, academic R&D spending in the US was ~$90 billion (https://ncses.nsf.gov/pubs/nsb202326/funding-sources-of-acad...). Out of that, 55% came from the federal government, 25% from the institutions themselves, 6% from nonprofits, 6% from businesses, 5% from state and local governments, and 3% from other sources. The share of businesses looks normal, while the share of nonprofits seems low.
I’m pretty damn sure you’re wrong about Europe on a relative basis. The percentages in most of Europe are MUCH higher. Eg Germany is closer to 80% than 50% gov funded.
(Earmarked gifts to an endowment with some level of direction/advice vs a foundation is a real cultural and tax policy difference, but the end effect is what matters and that’s not as simple as you’re suggesting.)
And not to be too flippant, but the question about the world outside of America applies also to the world outside the West ;)