The price of ordinance would be small enough so that putting some of it on target and returning to base would earn the cost back. This isn't about totally hamstringing people who want to bomb, but rather about adding just adding a little bit of motivation to balance out the takeoff-pork-bail/kamikaze cycle. As things are now, if you want to pork as quickly as possible, there's absolutely no reason not to kamikaze or bail every time.
I think the bomb and bail problem is overstated. In the countless hours of playing this game I've honestly probably seen a bomber drop his bombs and then bail maybe twice. The other countless hundreds of times, he either got shot down, shot me down, or rtb'd. As for the kamikaze thing, I've seen this a little more often, usually at a carrier. Still, the better fix would be to put a cap on the ability of a bomber to drop bombs at too steep of an angle.
You're right though, if a player wants to pork and suicide there's no penalty other than the fact that he is a dweeb and everyone knows it. That goes for fighters too, not just bombers, and IMO, suiciding Fw190A8's are more of a 'problem' than this bomber thing. If a player really wants to suicide for good of country, then that's his choice. His penalty is people knowing what a putz he is.