I've actually turned down work because I thought the NDAs were excessive, and because the terms would have precluded something more interesting down the road. I'm under a mostly-uninteresting NDA now with my side job. When I say that, I mean the people pay me to fix problems they have and contribute them back into the open source software they're using. So I can't disclose the problems, but if you look at the fixes I suppose you can figure them out for yourself

As to my day job, I tell my coworkers what I get. I've been here longer than all of them, but I'm unmotivated to leave, so I could probably get more if I played like I was.