Wizofoz,
You make an accurate comparison (judged from EK friends I have) of the benfits of EK vs an Aussie airline.
However, among the many reasons I have children is so that I could contribute, teach, enjoy and see them growing up. Glad you get a great deal to send them to a UK boarding school. Me, I think the 14,000AUD I pay per year for both of them to attend an Aussie school and see me more than just an occasional holiday is actually priceless. I don't care how much I would save 'financially', I wouldnt give up seeing them grow up for any price.
But as somebody here as already said - each to their own, we all make decisions based on different choices. I guess you are happy with yours.
M