“Those unwilling to work” is, according to modern historians, a euphemism for those condemned to death at the camps.
Truthfully, the Germans needed all the able-bodied workers they could muster. Unemployment of German nationals was 0% and had been so since the early 1930s. As the war dragged on, more and more workers were conscripted into the military. At the same time, there was an ever-increasing demand for factory workers to make munitions.
Every major concentration camp had 100 to 1000 sub-camps they supplied with workers. Auschwitz had at least 200 sub-camps, perhaps more than 1000. Only those who would not or could not work remained at Auschwitz itself. The rest were all moved to sub-camps to work on the factory floor.
What were the Germans to do with those workers who would not or could not work? Skilled German workers back home lived on starvation rations as it is. They’re supposed to let German workers (women and children) die of starvation so Jews in the camps could live?
If we are going to judge the Nazis by modern standards, we must be consistent. Where was the “Red Cross” and the massive humanitarian aid to these camps?