As the European Union continues to grapple with the challenges of balancing economic and social integration and free movement and social rights, tensions between socially and economically diverse Member States have become increasingly apparent. The concept of social Europe, which seeks to promote social rights, equal opportunities, and equal treatment across the EU, is under strain as individual Member States navigate the complexities of free movement and social protection under EU law. This chapter explores the emerging phenomenon of reverse social dumping, where wealthier Member States exploit lower social standards in poorer Member States to reduce their financial obligations. In contrast, poorer Member States may apply higher standards to protect their workers or gain advantages. These institutional manipulations of social security rules challenge both EU social policy and legislative enforcement, potentially undermining further social integration while also highlighting the need for a more resilient and unified social law framework.