^
1) Ok due to the money, they may (for a random example) have stables on grounds and horse riding on grounds but the money for example to take house riding outside of school would probably go further, plus getting your kid out of school friends. Also many privates surcharge for these more expensive extra curriculars. Like those schools with winter campus, you normally have to pay like a $2000 surcharge on top of already existing fees. I am a ballet dancer and used to train 20 hours a week after school and that extra curricular cost was a fraction of private school fees, plus arguably better training than if I was part of a private school ballet program.
3) There tends to be a wider range at low fee independents, particularly Catholic schools. But there typically is not much lower income representation. I was more referring to your $25000-$30000 bracket schools. And yes there are scholarship students but they are a minority of any private school populace, and imported to get good results/publicity from sport etc. for the school. If people are sending multiple kids to these high fee schools they'd have to be pretty wealthy. Even at a low fee though, I think there'd be a slight skewing of the school make up.
4) I didn't say it was narrow. But I'll stand by that private school students in my experience are more heavily spoon fed for the NAPLAN and OECD etc. tests. Their syllabus focus tends to be heavily geared towards those tests, and they tend to practice intensively for them beforehand. Granted, the HSC is probably something harder/can't totally spoonfeed, but we have known of private schools in the past to teach only select poems and help the class write the essays just for them, analyse the related texts in class as a group etc. so less independent learning. Anecdotal I know, but people I know who achieved high marks at comprehensive public school tend to find maintaining them at uni easier, selective kids sometimes struggles if they are the ones that have been tutored all their lives but private schools kids I have known have found it harder to maintain (though could be the freedom they find when they move away from overbearing parents
). Depends on the private schools though, I shouldn't have generealized and said all do, in my experience some do.
5) Simple economics would dictate but not all teachers are dictated by that.
6) Contradiction? As selectives perform better
7) I think with restructuring of the education system would provide better outcomes. Like if less funding was given to privates, then it could improve under performing public schools. Ideally, state education could cater for the needs of all, imagine how much more effective the system would be if money was better distributed and used.