I was entreated to join the AFPS but they illustrated the 'massive' loss served by a Brigadier because of the date he left the service and the huge pay rise that followed.
I wrote and said that I had little sympathy with the Brigadier who was still getting a massive pension compared with mine. I also benefited, with a birthday in April, from having my pension based on the latest pay deal.
I got a very nice letter back from the General agreeing with my points and conceding that it was not a one size suits all deal. He agreed that the 'new deal' would disadvantage everyone as the pension would be based on x/12ths of last years pay and y/12ths of this years where x+y=12 and not on the whole of this years pay.
I was still caught in the end however as I retired in October so my next pension rise was factored on percentage increase for that year.
You can't win.