Jede Menge Kohle (1981) on Netflix

Pitman Katlewski is fed up with his conventional life: a wife, small apartment, nice living room furniture - and DM 9150 in debt to pay for all of the former. One day at work, he walks miles underground to take another exit and decides that he won't return up through his pit and into his normal self, until he's freed himself of these bounds. He befriends the unconventional Uli, who offers him shelter. But soon he realizes that it won't be that easy to come up with the money, so he gets himself a chain saw...