Since its conception, social rights have been related to ideas such as those of dignity, equality and social cohesion. They served to cushion the economic differences caused by the market, what capacity do they have today to mitigate the growth of inequality or what is their relationship with social inclusion? Approaches to the effectiveness of social rights have traditionally followed different routes, along with indices and magnitudes relative to income distribution, indicators of social rights have been developed. Most of these models started from variables characteristic of an ?ex post? type of efficiency, ignoring the importance of creating inequalities at the source, as well as a diversification of the responsible agent. This work reflects on the viability of the different models of real efficacy or effectiveness of social rights in relation to inequality, providing ideas for a complex model that includes elements of egalitarian and meritocratic social justice, as well as news related to «Better Regulation» and regulatory impact analysis.