The Minister's Wife(1981)

Original title: La mujer del ministro

Rafael, a young man from the provinces, works as a waiter in a resort and helps himself economically having sex for money with rich older women. During a bomb threat, he is discovered in bed with one of the guest, Leonor Marchioness of Montenegro, and he is fired as a consequence. The Marchioness of Montenegro is an aging aristocrat, ruined economically, but still with wealthy and influential friends. She helps Rafael finds a new job in Madrid as the gardener in the mansion of Antonio Fernández Herrador, Minister of economy in the new democratic Spanish government.