This work presents a study on the efficacy of social rights in Brazil, in special the rights to benefits and justiciability in front of judiciary. The lack between the ideal transformation of Federal Constitution of 1988 and the tendency of do not change shown by political and social values in the recent history of our country highlights how much the State and the society are weakened to support the minimum conditions to the existence of human dignity, without which becomes impossible enjoy the fundamental rights, frustrating to the effectiveness of most constitutional rules. This study bigins by the analysis of the fundamental rights trajectory until its recognition on the Federal Constitution of 1988, going through the analysis of social rights as fundamental rights, their applicability and limits the efficacy of rights to benefits, grouping elements that can justify the increasing role of Judiciary, especially the Supreme Court in the economic and social set, according to his new role into the Separation of Powers, that is, comply with realization of social rights that belongs first to the legislature and the executive. The research sources are doctrinal, besides the study of some constitutional rules relevant to the theme and the jurisprudence selected mainly on the judged from the Supreme Court.