Right Way Up
I can't completely agree with you on your first point. Adding up to 5 years to the careers of pilots at or approaching the current cut-off won't necessarily add the same amount to those coming up behind.
If you assume that it takes 33 and 1/3 years to reach the maximum pension, many will opt to leave at that point. For example a cadet pilot joining a company at age 20 will have a full pension by the time he's 53. It will be up to him how much longer he stays after that. Similarly someone who's joined at a later age will still be able to get in enough service to enable them to look forward to a financially secure retirement.
On your second point, I would certainly agree that there's are some wingers out there, and not just in the LHS! Speaking for myself, I don't believe that I'm one of those as I love the job and am very happy with my current employer. My view on the latter may well change if they force me out at age 60.
PacksonFlite