I think this is really the issue. When I was in graduate school, I was in a group for some project. Before class had started, I was showing off another group member some little personal thing I had worked on over the weekend, some game or demo or something. The third group member, having seen this, was shocked that I was spending my spare time programming things for fun. I recall being perplexed by this, as it was pretty much the whole reason I was in the degree. She responded she was only interested in software engineering for the money.
It's not necessarily a bad thing to structure your career around financial success, but I met many people like her who were attempting to get jobs at Google or Amazon just to cash in as much as they could for a few years, then bounce. At some point your company is bound to become filled with people like this.