Economics studies how human beings produce, distribute, and exchange goods and services. It combines all of these other studies. It also teaches something else. Practicing economic action teaches practical psychology. Learning to win a job and to keep it, learning to bargain well, and learning to invest profitably and securely, all teach psychological wisdom rarely seen in a classroom.
Someone possessing such acumen sees through fictions.
He knows, if only implicitly, that reality is one thing, governed by one set of non-contradictory principles. When he hears something which contradicts those principles, he will regard it as a fiction, and he will not rely on it. If he hears that the government forbids bosses to enforce certain standards, rules, and quotas, he will remember that all organizations must have bosses, and that to be bosses, they must exercise their economically rightful powers. He will regard the government's law as a fiction, and he will not rely on it. If he hears that the government promises to teach children as their parents wish, he will remember that the government owns the schools, and that those who own a thing ultimately control it.