I've been called unambitious, and lazy in the past, all because I don't want to climb the career ladder and progress. IMO, career progression brings responsibilities and stress.
I like working in general but I don't care about earning loads, just enough to pay the bills and have a little left over. And I manage despite not earning much. I have no wish to move up but it seems to be difficult for people to understand. I would even take a job with less money if it was something Id be happy in.