this is an exaggeration. most of the time, they couldn't even get them to work. only in the last couple of years of the war did this happen. before that they just played soccer and socialised each day, lamenting the fact that they couldn't be outside bombing and assassinating people like the other jews still roaming undetected. they also had more benefits than mentioned. 'one hour of rest in the sun' was common, to ensure they got enough vitamin D as all their work was inside.