The French tax system is characterized by the coexistence of a progressive, family-based, complex and declarative Income Tax that only concerns half of the households, and a proportional tax, the CSG, collected on a pay-as-you-earn basis. A merge would simplify tax determination and collection...

The RSA follows two objectives: to increase the living standard of the working poor and to eliminate inactivity traps that result from low financial incentives to work. Because of its familialized nature, the RSA targets relatively well the poorest workers but also creates ambiguous effects in...