This article aims to question the development of territorialized insertion devices from the concept of partnership. The latter is mobilized by public action as a managerial tool. Indeed, territorialization of social policy has produced a form of institutionalization of local actors involved. From longitudinal studies conducted in the Brussels-Capital Region, we believe that this process confiscates the democratic debate to operate in consensual fashion while a system of competition between the “private” social intervention associations and the parapublic sector appears.