The article discusses the issue of politically-conditioned transformation in the sphere of performing public tasks, i.e. transition from the situation when state structures perform them directly to the situation when they perform them indirectly, maintaining supervision. These are phenomena of privatisation of public tasks and public-private joint partnership, which were adapted to Polish conditions before they were defined by legislation. This phenomenon is acceptable in a democratic, lawful state as the so-called second chance but from the political point of view and from the point of view of the need to implement the mission by public authorities it must be applied allowing for the consequences resulting from the principle of democratic, lawful state. Recent experience proves that in Polish situation public-private joint partnership was implemented much more effectively before it was defined by legislation. Thus, the existing legislation protects public interest but it constitutes a great barrier in practical implementation of this institution.