That's their choice. That's their life to do with as they wish.
One can just as well "vegetate" as an employee to a boss; indeed, we know that the nature of the current work setup is such that many come home drained from work all day, sit in front of the TV, take up drinking as a hobby, argue with strangers online (see me, now), decay into nihilism, etc, all the same.
The purpose of life isn't to work; the purpose of life is the other things, the fun and play.