I've never been motivated by money and I've been lucky to have had intellectually rewarding jobs for most of my career.

I get paid enough not to have to worry about money for the most part (although I still can't afford a house, but then who can).

My motivation comes from curiosity, difficult problems, or feeling that other people need my work.

One thing that completely shuts-down my motivation is imposed competition. I have absolutely no interest in doing a task to beat someone else or get there first if those motivators are imposed from without. However, sometimes I am motivated from within to make something a competition, I just don't want the competition to be mandatory.