In this paper we propose a social and health care model that offers alternatives to three problems arising in converging European welfare states, particularly in the southern nations: the rise in demand for services and features linked to the ageing process, the increase in dependency and the crisis of informal support. Development of the principles of social sustainability implies re-formulation of the regulatory, care, economic, administrative, cultural, and axiological framework enabling a response to the needs of long term care without compromising the welfare of future generations. Together with this principle, quality of life elevated to a subjective right directs attention towards the sphere closest to citizens, eliminating all barriers, which hamper exercise of this right. All of the above produces economic and social costs which must be accepted from a viewpoint of social co-responsibility, which brings with it the supply of welfare individually, without detriment to the exercise of state responsibility in guaranteeing a social protection system of a universal nature.