I suppose that the RAF has to get rid of most of us at/around our option points - otherwise there'd be too many 30 and 40 somethings and nowhere for the young thrusters to go. PMA must, therefore, spend an inordinate amount of time thinking up new ways to really p1ss us off!
Also, with overall numbers coming down, I presume they expect loads of us to leave in the next few years. However, they are probably a tad concerned that sooooo many are going.
Bizarrely, it would really screw up their calculations if everyone was to rescind their PVRs!!!!
The trouble is that PMA management (hahahaha) techniques worked when we were 60,000+ strong. As, however, we get down to 30,000ish and PMA miscalculate (as they may have done), then we could drop below critical mass and so implode!