There are people here who criticise Julia Gillard, but a few years ago when she was both PM and the local House of Representatives Member for the area that included YMPC she stopped the airfield being redeveloped into a new suburb.
Given PCK is the oldest continually operating Air Force Base in the world most of it is heritage listed and can't be touched. I'm not sure Jules is responsible for that.
Laverton from what I understand is another matter, although I believe the hangers adjoining the remaining apron are heritage listed as well which would cause most developers a few headaches.