Rules and laws change all the time. It wasn't all that long ago that interracial marriage was illegal.

So, what's your point? If its that Age 60 was the law when you got hired, should you be forced to retire at 60? After all, that was the law when you got hired?

Using that logic, only someone who is less than 5 years old TODAY should be allowed to fly to Age 65. Sorry, it doesn't work that way.