All well written stuff Otterman but you seem to have totally missed the point.
What about those of us, (and there are many), who signed up to a retirement age of 65 then saw it arbitrarily reduced to 60? We saw our RHS guys get a sudden lift, you see returning to the 'norm' of 65 as giving the RHS guys a sudden career reversal.
Your entire post is written as though the original age was never 65, for all weights, well it certainly was in the UK and I, for one, saw five worthwhile years chopped off the top end of my career, I want them back.
Possible that some of the confusion comes from the fact that at the time the age in the UK was dropped from 65 to 60 the majority of airlines in the UK operating heavy equipment were few and far between and had their own retirement age anyway, which was around 55, possibly 60 for pension purposes, when my ATPL was issued I could fly all weights up to the age of 65.