I think a good rule would be the driver gets a one spot grid penalty for each championship they have won. Would make things much more interesting.
I dont understand why anyone wants something like this surely the fix is simple, make it so the teams can properly compete on money terms. There will still be better and worse teams but it would be closer and you would get less predictability in results.

OOOR another brilliant idea would be to have one driver from each team drive the course Clockwise and the one driver from each team drive the course Counter Clockwise. Instant excitement!!!!
Death Race !!!!