The first half of this essay is to compare the two class-based analyses—neo-Marxist heory and social democratic theory—of the social welfare policies of the capitalist state. The former views the state's social welfare policies as a means of social control. The latter considers the state's welfare policies as having the liberating functions of decommodification. The author tries to clarify and define these tow concepts, and points out the different assumptions of the power basis of the welare policy-making, the policy's purpose in terms of calss politics, and principles of the welfare provision behind the two theories. The second half of this essay is a historical analysis of the soicial insurance system in Taiwan. The author traces the historical development of the KMT's social insurance policies and lists some important features of the current social insurance in Taiwn is a means of social control and has very low degree of decommdification.