Instead of a 4-day workweek how about setting reasonable hiring standards so that hundreds of thousands of people out of work, especially non-native German speakers, have a chance of getting past the job application screen.
Most jobs, even in tech, in DE currently require good knowledge of German, and "good" is being interpreted as near-native.
Most jobs, even in tech, in DE currently require good knowledge of German, and "good" is being interpreted as near-native.