In this paper we investigate the ethical implications of the Greatest Happiness Principle (GHP) in a complex system approach. The main question in political philosophy is: What do we need to do in order to live together well? In the complex approach, based on the wealth increase law, we take into account (i) the parameters, which may change by human decisions, as well as (ii) the long-term expectations, which motivate the decisions themselves. Factors (i) are material goods, money, parameters of human physiology (e.g. health), psychology (knowledge) and sociology (e.g. friends, power). These quantities are measurable in principle, i.e. they can be mapped onto the set of real numbers. The changes refer to exchanges between two agents or with nature, and there is production/consumption internal to agents. It is a hot topic whether there is a need for culture politics, or the market forces should govern culture too. Our results show that culture, knowledge and social relations follow different ethics from the one governing the exchange of the material goods, and there is no real market force at work for cultural resources. In particular, the Greatest Happiness Principle for the society provides rules and ethical demands for such transfers.