Let me see if I can't illustrate this in a way junebug can understand. She said (in another thread) that belief was not a bad thing, and I pointed out that it was also not a good thing. Belief is a neutral thing - something that can be either good or bad depending on the nature of the believer.
Greed is much the same. It is neither good nor bad in and of itself; it is neutral. What effects it has, if any, depend on the character of the person exercising it. So, Astreja, being basically good, does not do bad things in the name of greed. Whereas a sleazy lawyer or a crooked politician or a drug dealer or whatever, do do bad things because of their greed.