Darkstar, FruitBat, I'd tend to agree that some crew can be selfish when it comes to our terms and conditions. I'll admit that I'm rather well looked after by the company but that's not to say there isn't more than I feel we, as crew, deserve. That doesn't have to be money, time off or promotion, though. It could be a variety of things.
The people who complain about being grossly underpaid or overworked are, in my opinion, delusional. BUT it still doesn't really make it any of YOUR concern as a member of flight crew. Look after your own workgroup and, as long as others don't demand so much we'll bring the company to its knees, you shouldn't worry about what anyone else is earning.