Jealousy or selfishness?

I was trying to think about why, psychologically, people would be reticent to give up something of theirs to those who are already better off than them. I tried to have a dialogue with myself (and not be crazy, but that's kind of hard to do), and when I would ask myself, "Why do you not wish to give money to those who have more than you?" my answer was something along the lines of "they don't need any more, I need it more than they do." The other answer I would occassionally give was "they're already better off than me." These answers seem to embody selfishness and jealousy.

A question to be asked, then, is whether or not it is really selfish to think that I need money that (for the sake of the argument) I have worked hard to earn more than somebody who already has more than I will ever have in my entire lifetime. My immediate response is no, of course, because I don't want to be selfish. However, upon further reflection, I really think it is seflish, especially if I am trying to propone an elitist view. What if all that other person needs is one more dollar and he'll create the cure for cancer or the newest and best computer that will in turn lead someone else to create something equally spectacular? It does seem selfish to me.

I think it is also definitely jealousy. If someone is better or smarter or more wealthy than I am, I would feel jealous if he or she ended up with all of the money or books or whatever in the world simply because the person is better than I am in some way.

So I guess the point to all of this is that I (and other people probably) need to be less selfish and jealous if we are to accept my ethical theory.