Some people like to work. Look at Dan. I bet he doesn't make a lot of money with US(but i think he should, but sorry society isn't very nice to small brand names) but he does it anyways. He wants to help us enjoy the universe, the most fascinating thing I can think of.
You see the jobs that cannot be done by robots, are easily enjoyed by people. People like knowing they've done something most other people can't do. It makes them feel special.