The Great Madcap (1949)

Buñuel's first "comeback" film since "L'Age d'Or" in 1930 (he made only a few musicals in the interim), "El Gran Calavera" concerns a family's attempts to change the patriarch's somewhat indulgent and hedonistic ways by fooling him into thinking his large fortune is gone. They assume a life of poverty in Mexico in an attempt to teach him a lesson. However, he discovers it's a ruse, but continues to perpetuate the facade of ignorance while sneaking off during the day to conduct his thriving business. Why? To teach his family a lesson - they are all lazy, worthless leeches!