Australia

The fundamental issue of education is that if a school can choose its students, it will be a better school.

It ultimately comes down to funding. Pretty much all of those ‘better’ public schools have more money than the others, mostly due to being in higher income areas and having parents who are able to contribute more, give to fundraisers, etc.

No I don't think it's funding at all. None of the things that make a good school cost much money. Sure, the fancy private schools have nicer uniforms, go on more excursions, have better sports equipment, etc, but none of that has much impact.

What really has an impact is allowing the school to choose its students. For example if a kid threatens to kill a teacher in a public school, they are politely told "don't do that" and... that's it. There's basically nothing else the school can do. Not a hypothetical example by the way, it's a real one. In a study a few years ago, 99.6 per cent of Queensland public school teachers claimed to have "experienced workplace bullying" and most of them were bullied by students. I know lots of teachers, and they back that up with their personal experience.

The official state school line is they have zero tolerance to bullying, but the reality is very different. The reality is the only real options the school has is to send the kid to another school, which doesn't work because there's often no other school in the catchment area, or send the kid to jail / juvenile detention, which is only an option for extremely serious offences. Bullying doesn't get you sent to juvy (and it shouldn't). All the school can really do is ask the parents to do something - but in reality most parents are far less equipped to deal with behavioural issues than a school teacher.

In a private school - students who behave badly are kicked out. That's a real consequence and the result is better behaviour by students.

If basically every teacher has been bullied, that means every student is being bullied as well. I don't want my kid to go through that shit if at all possible. Which is why I'd like my kid to go to a private school. Not because they have better funding, but because they can choose their students.

While there are some expensive private schools, a lot of them (e.g. the one a couple blocks from my home) are very affordable. It's cheaper than sending a kid to childcare for example.