I think you'd need to demonstrate a reason that teachers are being drained in the first place, wouldn't you? The sources indicate that the funding is in place, but we still have poor results. And you did literally say that if a teacher was in it for the money, they'd be a banker, so it's hard to imagine I mangled that part too hard.
Regarding Finland, the author of that blog should be aware that many states already equalize funding between schools (in Texas this is known as 'Robin Hood'). The statewide school taxes are pooled and distributed between all the schools in the state, "guaranteeing equal allocation of resources to each school regardless of location or wealth of its community". In 1933.
A more modest set of proposals, along these lines, would do more to fix education than closing down the schools with good outcomes, or restricting what parents can do with their wealth:
1. Implement something similar to disbarring for tenured teachers. There's no reason someone just showing a video in class should be collecting 60k+ a year. The method of disbarring in the legal profession would suit this well - it's an evidence based process, with a judgement made by professionals in your own field. As it stands, removing a tenured teacher, no matter how bad, means the school will have to fight a lawsuit at very expensive rates. Which is why the preferred method of getting rid of a lousy teacher is to transfer them to an unlucky school in a different district.
2. Tie administration/principal salary to some percentage above teacher salary. You can google around for this, I don't see why a district administrator should be paid 300k when the schools in his district are turning out students that can't do multiplication or read properly. This would have to be done on a state by state basis.
3. Require senior level math, english and writing, and a teaching period senior project for Education majors in colleges. Currently the requirements consist of 'showing up', and math and writing is conspicuously absent from the degree meant to qualify you to teach. This I believe is on the states as well, since they, or some board elected/appointed by the state sets the requirements for degrees.
4. Independent teachers, home/unschooling, and private schools should be left alone, as they don't get money from the state in the first place. All of these students are required, as is, to take the same qualifying tests like the ACT, SAT that public school students do, and while their parents pay taxes to support the public schools, they are no burden on the school and consume no resources.
None of this will ever happen because it might actually fix something though, so I guess I was just feeling optimistic for a bit there. Don't let me distract from the discussion about non participation in social communities and group ownership of the neighborhood lawnmower.