There's nothing morally wrong with being greedy by itself. If someone does a good thing for selfish reasons, that's still a good thing. If I decide to become a doctor because I selfishly want respect, admiration, and social or monetary capital, the world is still better off for me doing so. Sick people will get better.

Greed only becomes bad when you empower people to use violence to keep themselves on top. Most often it is the threat of state violence that forces people into situations where abuse occurs.

No, you can't disassociate from my factory because I own the patent (says the state), I own the land (says the state), and I own the distribution liscences, (says the state). If you violate my state given rights, the police will come and beat you. I can abuse you, and you can't leave because the state will punish you if you do. It's against the principals of the free market.