People normally assume that immigration will expand the welfare state.  The lazy version says (a)  immigrants are net beneficiaries of the welfare state, and (b) people vote their self-interest.  The better version says that immigrants' countries of origins favor more redistribution than natives - and immigrants bring their political culture with them. Both stories, however, ignore the effect of immigration on natives' support for the welfare state.   Researchers - most of whom look kindly upon both immigration and the welfare state...