I'd place these at $60k-$100k: enough to live on, but not enough to go into it for anything other than love-of-science. A university president might hit $200k.
I'd hire many more academics, and given them much more freedom. Not as much publish-or-perish, and more intellectual exploration. Anyone qualified to do research should have the option to do so in their field of interest.
That's kind of how academia used to work before massive endowments.
I might also do something about tenure. It seems like an obsolete idea as structured right now. It's not a horrible idea, but it's obsolete in a lot of ways. It forces people to put in massive efforts early-career. That, for example, it doesn't line up with biological clocks, and puts in many other bizarre incentives. I don't mind someone gaining tenure if they've done fantastic work, mind you, but it shouldn't be a 7-year clock. For example, perhaps you're a professor with a 5-year renewable contract. If you do fantastic work, you become a professor-with-tenure, whether that's 4 years in or 40.