I am 67 and fly a four-engine jet for a government agency, and I'm not the only one there in that age range. Why do I do it? Because I enjoy it, I am still capable and they value my experience. I have a nice airline retirement, so money isn't a motivating issue. The money is just icing on the cake. Being forced to walk away from what I enjoy just because a junior guy wants my seat is assinine.
It's almost like hearing 411A again, just before he checked out. Luckily, he didn't do it flying.
He passed every medical with flying colors, but it didn't matter one bit.