" Seizing the results of someone’s labor is equivalent to seizing hours from him and directing him to carry on various activities. If people force you to do certain work, or unrewarded work, for a certain period of time, they decide what you are to do and what purposes your work is to serve apart from your decisions. This process whereby they take this decision from you makes them a part-owner of you; it gives them a property right in you "

― Robert Nozick