Reading this thread has been fascinating. I'm perhaps naive & simplistic in my thinking but here are some of my thoughts.
I think my behavior would be driven by needs alone. However, I have some doubts. Say I needed money and decided to steal. If the person I stole from needed the money more than I did and ended up hurting as a result, with or without a doctrine of wrong & right, wouldn't I still feel bad for causing someone else pain? Would I not therefore refrain from stealing from that person? Or are you saying that I would no longer react emotionally to the consequences of my actions? Are my feelings a result of a learned moral doctrine or something else?