“Render unto Caesar the things which are Caesar’s, and unto God the things that are God’s”
Translation: Stick to saving souls and leave the secular stuff to the world. Once the church crosses the line, it becomes vulnerable to be being co-opted and corrupted by the world.
I think you are forgetting much of the Old Testament. Remember how the prophets denounced those who oppressed the poor and powerless?
Economics is a human activity. As such it is open to scrutiny in regard to morality. It’s just that simple.