Are you saying that the reason "I would like to give my child a good education" is not a valid one? Before you argue, yes I know that in public schools good educations are provided but it is a personal choice and one that many parents make.
Beg pardon but what exactly is the life? Also of all the private school people I know maybe two or three have lawyers for parents. Added to that, no one I know at private schools wants to be a lawyer, do Law yes maybe but in a double degree. So really broad generalisation.
I go to an Indendepent Catholic school where girls will have brothers at Joeys, Riverview etc. On the North Shore, there are many private yet very good schools. When we moved here, we looked at a number of different high schools and my parents thought that it'd be better not to send us to public high schools. They had been to public high schools in the states and in all honesty the system over there is so much better than here.
To address the issue of funding, I would have to agree with the comments jebbie and not that bright made, without funding to private schools the fees would increase (perhaps drastically, maybe not) however it would lead to a large number of students not being able to further attend because of the fee increases. Unfortunately Sydney public high schools do not appear to have the ability to handle this. Also to make all schools public, an impossible idea, it would lead to less funding for everyone.