> If the rate of new P0-P2 bugs is higher than the rate of fixing being done, then the P3 bugs will never be fixed.
That's quite a big assumption. Every company I've worked at where that was the case had terrible culture and constantly shipped buggy crap. Not really the kind of environment that I'd use to set policy or best practices.
If you're in the kind of environment where you fix all your bugs then you don't have a ballooning bug backlog and the problem never arises. I've worked in places that fixed all their bugs, but to my mind that was more because they didn't produce the kind of product that has P3 bugs than because they had better culture or something.
That's quite a big assumption. Every company I've worked at where that was the case had terrible culture and constantly shipped buggy crap. Not really the kind of environment that I'd use to set policy or best practices.