Increasing proxy distance or stopping bailing from undamaged planes won't fix the problem.
But I know what will.
A perk economy!
Think about it. All MW and LW planes have a cost. You have to fly and fight to earn your perkies. All aircraft are perked based upon ENY and Ord package (of course this affects bombers more cause of the ORD part, so they get higher perk bonuses per damage done). If the plane actually MEANS something, a person would be forced to try to take care of it a little better, wouldn't they?
This is only partially serious. Too many people would be mad a not being able to play their plane when they wanted to and quit the game. Don't get carried away here. hehe