Traditionally, the welfare state reforms are embodied in the marketization reforms represented by the Reagan Reform and the Thatcher Reform, which has been presumed as the reason for the increasing inequality between the richpoor since 1980s. The marketization argument as well as the Capital/Income argument by Piketty, however, are both unaccountable for the essential force for the widening gap between the richpoor. It is therefore necessary to review in the ProductionDistribution perspective: the production regime of the welfare state has the characteristics of the marketization or commodification, which naturally drives the consistent widening of the richpoor gap and testifies the Marx explanation upon the inequalities by the mode of production in Capitalism. In the meantime, the distribution regime of the welfare state has the characteristics of the nonmarketization or noncommodification, which to some extent makes the adjustment in the inequalities by the redistribution yet nonsignificantly. The limitations of the redistribution in welfare states are mainly reflected in that the reinforcement of the redistribution can neither restrain the expansion of the richpoor, nor meet the welfare demands, causing the alteration of the ideologies in the West from the ordinary people. The reasons of this limitations lie in the disordered intervention by the overlapping functions between the distribution and the redistribution, that the improper intervention by the ambiguity in publicprivate boundary in welfare provision, and that the rigidity of the welfare expansion track caused by path dependence of the welfare institution. The reevaluation of the richpoor gap widening, the limitations of the redistribution and their causes in welfare states from the perspective of the productiondistribution relation, is of great importance in deepening the comprehension of the internal operative mechanism of welfare states and its future development.