In simple terms lets take a hypothetical GPS school with 1000 full fee paying students (including those on third party full fee scholarships) each paying $20k for the privalege of earning the GPS branded education.
Before federal and state funds kick in, that is $20m revenue each year.
6 Schools represents $120m revenue each year.
What sporting body or government is prepared to subsidise all or a combination of one or more of the ISA, CAS, AICES, CCC, or State High Schools to that level just to retain top rugby players outside the GPS system, or even to attract players FROM the GPS System due to better facilities, coaching, rep opportunities.
What would be gained by taking on and "breaking" the GPS system?
It is what it is and will remain a fact and a limitation that ARU and others will have to learn to deal with like families develop strategies to deal with the drunkard of an Uncle who always turns up to significant family occasions.