Was the radio play used for political propaganda? Dr. Hans-Ulrich Wagner looks into this in his article in the journal 'Medienkorrespondenz' [Media Correspondence].
You can read the article here.
Abstract
So much for the heyday of the radio play! All the beloved, award-winning and cherished "dreams", good gods "of Manhattan" and ships with such deceptive names as "Esperanza" sailing around the inner seas of our imagination - all these radio plays actually served a perfidious re-education plan. Günter Eich, Ingeborg Bachmann, Fred von Hoerschelmann, and all those who submissively offered their talents to the radio stations - they were agents of a gigantic mass education, of a "mass aesthetic re-education policy conceived as popular education".
Wagner, H.-U. (2020): Gehirnwäsche der Deutschen durch Hörspiele? [Brainwashing the Germans through Radio Plays?]. In: Medienkorrespondenz, No. 18, 11.9.2020, 38 (online).