Unfortunately we can't stop the aging process, regardless of how much we may want too. In my workplace burn out seems to be a common factor in people leaving. Oh sure the bosses are (usually) nice to you and so are the other employees, course they have to. We have an effective union, which I used (got a really shitty boss fired AND a terrible CO who followed him out the door too). But most people can't leave cause of the rising cost of living. So they leave later and later in life, some in their 50's or 60's form the look of it. Though it could also be the burn out too.