The paper compares the social policy program Progresa-Oportunidades-Prospera through twenty years of operation in Mexico with the new programs of scholarships "becas para el bienestar" implemented by the administration 2018-2024, to know if the new social programs improves the design of the former Prospera program, or it is just an arbitrary change without taking into account the knowledge generated from social policy in the past. [ABSTRACT FROM AUTHOR]