Economy (money, possession) builds the realm in which you have to perform a duty that is observed, and in return receive a reward (or are not punished). It could also be that you are the one observing and giving a reward. Typically, within this realm, you are liked better if you are a threat to someone outside the in-group (in case of a reward), or no threat at all to anyone inside the in-group (in case of withheld punishment). This exemplifies social indirect couplings with the social system of media, often occurring through the direct coupling with the psychic family system (love) or religion (God).
In all these systems the reward-punishment distinction can be recognized as the code of the system of economy. Less common, but not of lesser interest, is when we find this code working its way in art and politics. Apart from the media system the economic system is indirectly tied to the social system of law that attempts to sanction bad behavior within this realm. Because of its indirect proximity as a structurally coupled source of influence, however, law plays a double role in this realm. One could say that it eats the system up from the inside. It may well be suggested that more traditional forms of society have had this danger under better control through a stronger emphasis on morally or ethical behavior, which has obviously been a principle consideration in constructing laws. As Luhmann wrote, “the attempt to cure all of the morally weak areas of society with ethics (with a moral reflection) borders on the ridiculous” (1997:359).