The assumption that was made that started this whole discussion is that the plane broke up in flight. That is usually a very sudden and violent event, not one that allows you to go get a parachute on. Even if you happened to be wearing one, an in-flight break up at .94 Mach would not be survivable, with or without a chute. So wear them for a few missions when the war kicks off just to make you feel cool like somebody's gonna shoot at you, then pack them away and save AFE 5,000 man hours a year.