Politicians are very good at telling you what you want to hear to keep your support.
The ones you correspond with may know exactly what is going on, how they will vote and how you think about it. But they don't want to look like the bad guy. They feel the pressure to act on a perceived age discrimination issue. Their non-pilot constituents wouldn't understand if they showed ANY inclination to vote against the elderly. They also don't want you or I to think they are intentionally voting "against" the membership of a labor union. Even if it is just a pilots' union. They feel they can stay in favor with us if they say the right thing while voting for age 65. They have spent many years learning how to appeal to more than one side of an issue. Also, if it comes down to siding with labor or the elderly, I don't think labor will win.
Don't give up the fight but don't expect much. We may still be able to work on getting rid of the retro thing.