The only problem with that scenario is that CASA dont generally have enough surveyors with a) time on type b) time in that group e.g. 20/21 and c) everything is now being centralized in Canberra.
But I do like the thinking.At least doing the PCT oral exams at Qantas now,you are quizzed by people with knowledge,time on type,and thats excluding the lead quizzer.So far all my PCT instructors have been guys that I respect as LAMEs.