That would just create a bidding war and wouldn't stop the arms race at all.
Also, once the rewards increase past a certain point, security researchers would have no reason to work for apple, since one big hit would mean set for life.
Security researchers on ImmuneFi can be set for life by submitting a large bug bounty today. But that's extremely rare, and you don't see them lining up to leave apple.
Also, once the rewards increase past a certain point, security researchers would have no reason to work for apple, since one big hit would mean set for life.