Bailing from a undamaged aircraft should carry a penalty, maybe half perk points or something.
There are already penalties.
If you bail your buffs instead of coming home you get only 80% perk points, and it massively hits your score (damage/sortie is modified accordingly and you get only 40% score points).
Bomb'n'bailers are ignoring all this, and would very likely even ignore much harder penalties, because they practice this method mainly for increased "war" efficiency. Meaning the ability to get back to the target as soon as possible. Oh, and the scond reason would be to 'deny' an intercepting player a kill - EGO stuff.
There had been plenty of discussions about this over the years, even HT himself was thinking about ways to make it stop. (Maybe I can dig that thread up later)
Unfortunately each idea of how to do so was quickly turning out to be either easy to be countered by a bomb'n'bailer, and/or mostly hurting the 'honest' player.