In my humble opinion mate, it’s more a factor of how much the current top teams have been allowed to game the system financially in years gone by and build squads with 3rd/4th choice players who’d walk into any of the other 14 teams.
THAT is corruption, as is pulling the rug from under aspiring teams with PSR. And that’s why you see record points tallies, goals scored, trophies hoarded by a handful of teams etc.
I don’t disagree with you at all, I just haven’t quite got my tin foil hat on.