But it's easier to go to the big media outlets and tell the workers "We have to be prepared to work harder and harder again" and "You also have to sweat", like the bosses of the biggest German bank, Bosch and our finance minister did.

(source)

I believe the liberals are really afraid of a wave of people realizing that working less for the same amount of money is an option. When the train drivers get their 35 hour work week without any pay cuts, there will be more people also taking a liking to that idea. Worst nightmare of the upper class.