Wallabies great and NSW Rugby chairman Nick Farr-Jones has questioned the future of the elite GPS sports competition, in light of the 101-nil thrashing of Newington College by former close rival Scots.

Farr-Jones said drastic change was needed to Sydney's most prestigious schools association to protect boys from harm and to stop such mismatches. Private schools should also cap the number of athletes on lucrative sports scholarships to ensure a level playing field, he added.

Thrashing: The Scots College rugby team beat Newington College 101-0 on the weekend. Credit:Louise Kennerley

"I don't like mismatches," he said. "I don't think it builds character. I don't think it is good for anyone. My major concern is safety. If there are significant weight and strength differences [between teams] then there are safety issues and we have to be careful of that."

NSW Rugby was considering a proposal under which GPS rugby would be replaced by a broader and more balanced competition that included other schools and junior rugby clubs, Farr-Jones said. The proposal had won support from some schools and clubs, he said.