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.