So 'single payer government schools' work fine in areas where the adults are themselves educated. They work poorly in areas where the adults are not well educa

So 'single payer government schools' work fine in areas where the adults are themselves educated. They work poorly in areas where the adults are not well educated. No variable you can change will make a dramatic impact. If the parents aren't educated, they can't tell whether the school is good or bad. In that case, they are going to be conned by charlatans, it's just a question of government charlatans or private charlatans. If the parents are educated, they won't send their kids to a crappy school, and will either use money saved by living in a worse school district to help pay for private school, or will move. Either way, educated parents who care will not send their kids to garbage schools. The net of all that is that dumber, less educated people will end up with dumber, less educated children because they don't know how to get their children a good education, or even how to tell the difference between good and bad schools. How you pay the bill or how you organize it will not matter, and studies have shown this over and over.