Proverbs 22 verses 22, 23 say: "Rob not the poor because he is poor neither oppress the afflicted in the gate. God will plead their cause and spoil the soul of those that spoil them."
My definition of "to spoil" is to remove the wealth of a person once you have the victory over him. It’s easy to rob the poor and oppress the afflicted because they have little power to resist you. You don’t even have to fabricate a fight with them as an excuse; you can just rob and oppress. But God will remove the wealth from the soul that has oppressed the poor and afflicted.
What is the wealth of the soul? Since the soul is non-material, I expect the elements of wealth are non-material as well. They would be such things as: intellect, confidence, joy, sense of direction, and knowledge of accomplishments. The loss of such things is clearly not wanted, but God will remove them from the oppressor of the poor and afflicted.
Hopefully, we are of the sort that would not even conceive of afflicting the poor and afflicted. We are to seek to be like Jesus. Jesus instructs us to care for them. Jesus instructs us to never oppress anyone. Why would we? Why should we?