This paper looks at the role of the EHRC in the wider context of measures to promote equality in the welfare state, and highlights two major problems. First, social policy uses categories which are derived from empirical social analysis and processes of policy design, while anti-discrimination and equality 'grounds' (such as gender and ethnic origin) are drawn from the mutual recognition and political mobilisation of groups. The intersection of these two epistemologies can produce progressive social reforms, but it can also result in sterile political competition between groups. Second, equality law makes rights-based claims which are deliberately abstracted from the problem of aggregating rights into a manageable set of claims on scarce re...