To me it is about work ethic or attitude. Aussie girls (in general) don't have the same work ethic as Asian girls. One Korean girl told me at home she was a Nurse in a cancer ward. Here, they wouldn't recognise her degree or Nursing qualifications. She was earning more here than at home! OF is probably less work for Aussie Girls, as to the money? Who knows i suspect given the number of girls on OF it must be lucrative for them. Otherwise they wouldn't do it.