This is false what you write. Or at least you summarize very clumsily the history of France during the occupation. This last word is important to understand: "OCCUPATION". From 1940, there were 2 "France". One in the pay of traitor PETAIN who delivered the country to the occupying Nazi. The other, representing the majority of the French, refused this occupation. What could the French men do with this Vichy regime devoted to the occupier? Nothing. Any attempt to refuse to go to Germany or to obey any order sent his family and himself to camps. You say that the prisoners were obliged to write that everything was fine. If it was practiced somewhere, it was very far, not a generality. On the contrary, it was difficult to hear from him. My wife's grandfather was a prisoner on a farm where he had to work. It was almost impossible for him to write to his wife to give him news. NOT ALLOWED ! He had to find ways to send his letters. Care must be taken not to generalize certain things that can be read or heard. And to say that the French prisoners were privileged workers (even compared to other nationalities), I find it really inappropriate.