Cabal
Agreed that most (but not all) of us are terribly self-interested. There are some of us out there, its just not always so easy to find us. While I typically am very much a partner to my clients, i often find that I have to be adversarial at times. 6 months ago I had a listing that the seller insisted she get a certain price for. I knew she couldnt get it. We got a great cash offer and I worked her really hard to accept because I firmly believed it was in her best interest to do so even so she couldnt see through to understand that. She fought me the whole way through the transaction and it would have been much easier to give in to her and her self-interest. She now calls me on a weekly basis to thank me for doing what I knew had to be done even though she couldnt see it at the time. She has since referred her 2 best friends to me.
All the unethical stories I tell after a few drinks involve crap my clients, other buyers/sellers and agents tried to pull. Its amazing what people think they can get away with.