According to the demands of optimal currency area and the postulates of Economic and Monetary Union (EMU), European dream is to increase flexibility of its labor markets, since it assures to deal better with asymmetric shocks. However, the European Union wants not only to provide societies with sustainable economic growth thanks to flexibility, but its goal is also to assure citizens the social security in form of ever-improving living and working conditions, what further will induce full employment, good quality jobs, equal opportunities, social protection for all and social inclusion. On the one hand, there is desired flexibility to perform better in global arena and to improve competitiveness. On the other hand, there is the everlasting need of welfare insurance. Post-communist countries also face this challenge.