Well the problem is that everybody would have to do this. Otherwise people will simply take their business elsewhere to find prices that are considered normal.
Further our hobby is already too developed for a change this massive to occur.
As a breeder why would I not want to sell all of my animals at top dollar?
As a breeder buying new breeding stock why would I want to pay more than I am now for the same animal?
What about pet stores? This hobby has a steep enough learning curve last thing we need is to make things more complicated for beginners.
I understand what you are trying to say about limiting breeding stock but I just can't see enough breeders jumping on the bandwaggon for it to actually work given the issues I listed above.