Raising the retirement age to 65 was a good and timely decision.
In the future it makes sense to review this age further upwards in view of life expectancy. If this delays the promotions of F/Os, so what? You'll get it back at the other end anyway.
The age change is good for us as a group. It benefits everybody long term.
When I started out in commercial aviation in my mid-20s I had the privilege of flying with guys that were approaching 60. These guys were knowledgeable, cool characters who were completely unfazed by anything thrown at them. It taught me the value of experience.
Those that oppose the higher retirement age are only thinking short term.