The issue of the accessibility of social rights to foreigners outside the EU, especially with regard to so-cial security benefits, is a constant field of political confrontation and legal discussion. These are very sensitive issues that touch on both EU and national Law, including inviolable human rights, the principle of non-discrimination, legislative discretion and the sustainability of Welfare systems. In this complex activity of balancing interests, values and principles, the role of Constitutional Case-Law in recent years has been central, direct, through precarious and daring balances, to the harmonization of national and EU Law and the implementation of the principles laid down in our Constitutional Charter.