EN
Some consider that public aid in the private sector of the market economy disturbs the mechanism of free market competition. In the Treatise and other documents of European Union, competition is a main way to realize common economic and social ends; thus, public aid may be used. I analyze the special situation of public aid for the financial sector in 2008. The aim of the article is to the justification for public aid for the financial sector. The method of analysis is the set of principles of Catholic social thought, as Christian values were the roots of the European integration project. Common good, subsidiarity, solidarity and social justice public aid for the financial sector may be unjustifiable, especially in the context of solidarity.