All I hear is
So basically what you're trying to say is that everything is illogical so logically speaking, the most illogical thing to happen is what will happen.
When they relocated Crystal City here, it was in commuting distance of the employees, and it wasn't a large move for those that opted to relocate closer to the base. Relocating anywhere outside of the capital region would result in large-scale changes (and likely a lot of employment changes) that would cripple NAVAIR, which makes absolutely no sense. There isn't another place they can make as a test-flight base nearby, so that's what would happen if Pax were BRACed.
When they relocated other bases here, their functions were programmatic in nature and it was useful to put them closer to the IPTs and test community (which was why they put the IPT out here in the first place, to bring them closer to the test community).
They used the space in Crystal City for other stuff. They found good uses for most (all?) of the other bases that were BRACed. What would they use Pax River for, exactly? If over 50% of the local population moved away (with the rest of the area having its housing market crippled and economy destroyed), what would happen to this area? Would the local government use the base as a large fair grounds? Would they try to put in a new airport (Miramar), level it for more housing & shopping since the land is in high demand (Oceana), or would the land go to waste as the entire area collapses?
Before you make asinine statements, try to use a little logic. As shocking as it may seem, they actually use sound reasoning when they make BRAC decisions.