Privatize education. Its the only path to fix this.
This is not the answer because you are ASSUMING the bottom line while paying no attention to the rest of the lines that make up the system. I've gone over this time and again,
1.) Kids want to do their thing and not be overly bothered with things like discipline, learning, grades, etc.
2.) Parents want their little darlings to be happy and when they aren't the parents are up there with their pitchforks and torches complaining that "those teachers be put in their place" so their kids will be happy.
3.) Lots of Administrators are literally whores who will do anything to keep their big salaries and perks, and their school's funding. This means dealing with and manipulating the group with the least actual power, which are the teachers.
.4) Yes, there are bad teachers out there. Lots of them. As a teacher who always at least tries to do the right thing and teach the students as much as possible, I have fought against bad teachers most of my adult life.
If administrators are whores who will do literally anything for money in a public school, how will the administrators at a private school be anything but that. You can daydream about standards, and holding people accountable at a private or public school but unless you have some sort of system in place with certain factors guaranteed you're just doing the same thing as the parents and kids are right now, taking the easy way out and damn the facts, I'll take the assumptions.