Lobby your local government. Here in DC that age discrimination is outlawed for anyone over 18.
Wouldn't it make sense for you to care now since you're guaranteed to get old but you're not guaranteed to become any younger?
You could care about your fellow human.
I mean, yeah yeah, all true. But he seems to be coming from a solely self-interest POV and I felt like even from that POV it's inconsistent to not support this protection.
"A society grows great when old [people] plant trees in whose shade they know they shall never sit."
Well, they aren't guaranteed to get old...
Additionally, caring now, while self-serving in the long run, could appear to others to be a selfless act.
That's the attitude that's running our civilization to the ground...