Economic entities in the EU are extremely valuable actors not only of the economic life by contributing to national income but also by creating jobs, spending some funds for research and development, and creating progress. The European integration is based on the Single Market, and it has increased the role of these entities. Granted privileges - liberty of running business, freedom of services or capital, make a framework of economic activities go far beyond national borders. The effect of free choice of a place of business on the one hand and considering the role of economic entities for a given region is to increase their role in the process of the European integration. One of the aspects examined in the paper is the growing importance of economic entities visible at the stage of co-creation of the EU law and the role played by a strong lobby of employers. The authors presented their voice in the debate around the question: Does the growing role of economic entities threaten the function of the state - or the EU institutions, which in a given field took the power from the states?