The Chile pension system (Spanish: Sistema Previsional) refers to old-age, disability and survivor pensions for workers in Chile. The pension system was changed by José Piñera, during Augusto Pinochet's dictatorship, on November 4, 1980 from a PAYGO-system to a fully funded capitalization system run by private sector pension funds. Many critics and supporters see the reform as an important experiment under real conditions, that may give conclusions about the impact of the full conversion of a PAYGO-system to a capital funded system. The development was therefore internationally observed with great interest. Under Michelle Bachelet's government the Chile Pension system was reformed again.