Oh interesting, your views inconveniently disagree with my experienced reality, which relates to numbers I can immediately look up because I have worked in that industry. I’m sorry about your views for you. A supermajority of teaching at American Higher Ed Institutions is done by people who get paid a couple hundred bucks per course hour, and teaching a 4:3 course-load under those conditions will not yield the numbers you are vaguely gesturing towards.
Go ahead, pick a school and look up their adjunct job offers.
Sorry bud I don’t get paid to do your research for you. If only there were people whose job that were.