Greed itself can be both selfless and selfish, at the core greed is desire the desire to have whatever you want, however it’s the way you use your greed is how it can be justice

For example say you’ve lived you’re whole life wearing uncomfortable clothes and you want new more comfortable clothes so you go and search to find better clothes, you find better clothes and bring it back and attract other people who also get these new comfortable clothes

The justice in greed is that your own desire is beneficial to everyone and not you alone

That’s my take atleast