Abstract
Restructuring welfare society is important problem in our society. In this paper, we show 5-types of social system approach to explain the structure of our welfare society. This approach is based on welfare pluralism and Yasuo Sakamoto's meta-typology. By adapting our approach to social security institution of 6 country, we try to explain the standpoint of social system approach to welfare society. If we take Og-type system which characterized inter-generational redistribution principle, our society must have schemes that ensure the population balance, like childcare, child benefit and so on. The functional disease of social systems is leaded from a lack of such schemes. Hence, we need to design our welfare society considering sustainability, consistency of mutual-effect and the situation of social environment.
