The recent revision of the Italian Constitution has profoundly altered the distribution of powers between the state and the regional administrations, with the latter acquiring extremely important areas of jurisdiction. Among the powers devolved to the regions is authority to issue rules which integrate the state law on supplementary social security, or the set of financial instruments that flank traditional state pensions. This decision by the Italian legislators appears justified by a set of «failures’ associated with the mechanisms for voluntary subscription to supplementary pension schemes. The first and most important of such failures is the modest proportion of the population " especially among the most vulnerable groups " which opts for these investments essential to guarantee a future characterized by significant cutbacks in state pensions. In this regard, signal mention should be made of the experience of the Trentino-Alto Adige region, which has implemented a series of innovative measures able to overcome many of the difficulties that elsewhere have obstructed the introduction and development of new social security models.