Why bother about justice here, if all injustice is to e rectified and compensated in the next world?
You are forgetting your own principles. We must do right always because right is right. If we don not, we shall be punished by God precisely because the right was right and we should have done it. It belongs to God to adjust all seeming inequalities in the next world, but that in no way exempts man from his present duties. Men must acknowledge the benefits they have received from God, and discharge their obligations towards God, even as they discharge their obligations towards fellow men. this is a strict duty. Not all men will fulfill this duty in practice, and God will deal with them sooner or later, compensating those who have suffered from the injustice of their fellow men.