The paper shows that adding social security based on a pay-as-you-go principle (PAYG) prevents countries from successfully harmonizing their individual social security systems. As claimed in the paper, the PAYG systems are extremely complicated to harmonize when the labour force is mobile among...

Aspects of labor mobility and discrepancies in social benefits schemes in Member States became an urgent matter to address. Revision of the Posting of Workers Directive, the European Pillar of Social Rights and the European Mobility Package were aimed at introducing more harmonization within the...