Southern European countries have traditionally been perceived as weak immigration countries with inefficient legal entry avenues for foreign workers, high irregular migration rates and poor integration policies. In recent years, however, the adoption of more efficient control policies, new recruitment strategies and embryonic integration plans throughout the region has led to a change of paradigm in the governance of migration. And yet policy reforms do not seem to have produced the same results everywhere. The aim of this article is to enquire into possible explanations for the divergent paths of labour migration governance in Southern Europe, using Italy and Spain as comparative cases. As it will emerge, policy efficacy in the field of labour migration relates not only to the quality and consistency of policy design and implementation but also to factors that escape direct political control.