How Did We End Up Like This, Sotiris? (1972)

Stuck in the same position as a clerk seemingly forever, humble Sotiris finally gets his lucky break when he stumbles upon the fat leather wallet of the compassionate industrialist, Diamadis, and, just like that, he lands a prestigious and, above all, well-paying job. Now, friends and relatives all want a piece of Sotiris' handsome salary, pushing him to his limits. The root of all evil is Sotiris' meddling mother-in-law, who's been telling everyone that her daughter's husband is now rich. Is there an easy way out of this mess?