Social policy has become an increasingly prominent component of the European Union's policy-making responsibilities. Today, for example, a highly developed body of law regulates equal treatment in social security and co-ordinates national security schemes; national health services have opened up to patients and service providers from other states; and rules govern the translation of educational and vocational certificates across member states. This state of affairs is all the more remarkable given the relatively limited resources at the EU's disposal and the initial intentions of its...