The study, basing on a multidisciplinary literature, considers flexicurity as any balance between flexibility and security and, therefore, proposes ordering any set of contracts, providing the same balance and with the same regulatory framework, in “communities.” It is assumed, therefore, that communities can differ either in terms of a “protective” tradeoff, where the differential is not a surrogate measure of security, or in terms of an economic tradeoff, where it is met by the provision of social insurance or security. After identifying from ILO, EU and constitutional sources the foundation of the “incompressibility” of rights which guarantee decent work, the paper likens decent work to a public good of general interest, in the same way as laws generally recognize the natural environment. On the basis of this comparative axiom, the paper proposes considering the dispersion of security produced by undeclared work as “undecent” work and, therefore, as a form of “pollution.” Because an environment can be little or very polluted, the paper proposes considering as social pollution any form, even legal, of security leakage such as that induced by the precarious and atypical jobs. In this way, each community expresses a degree of social participation in environmental pollution: from the maximum produced by undeclared work to the minimum produced by labour standard. The adopted economic approach allows defining this pollution as a negative externality and, therefore, refer to its contrast in terms of internalization. Among the techniques of internalization, the preferred one is the Pigovian tax, because it can overcome the difficulties associated with the identification of taxable income in the undeclared work and in the informal sector. In this way, it is believed that on one hand you lose your interest in hiding most of the black job. On the other hand, a mechanism would be enforced that forces polluters to contribute to the financing of the security needed to address the pollution created. Because of the adopted ordering of communities, this positive effect would also impact on precarious forms of employment and atypical work in proportion to the security dispersed
