That's a reasonable observation, but there's a big distinction between "aren't the ones who work" and "obsolete". My experience makes me think that people very

That's a reasonable observation, but there's a big distinction between "aren't the ones who work" and "obsolete". My experience makes me think that people very much do _not_ want to be obsolete, and that being obsolete is devastating to one's sense of identity and social acceptance. I do think they also have the drive to work less, but there are plenty of people who do things for fun that other people would call "work".