““The Luftwaffe effectively “rented” slave labor from the SS both to build facilities and to operate manufacturing lines making V-2 rockets and other high-tech weaponry. The SS actually charged a per-day fee for each slave worker, set well below the average wage of a regular German citizen, and provided all services, such as guards, food, and so on. Perhaps not surprisingly, the workers used for the programs underwent shockingly brutal treatment, regardless of whether they built V-2 rockets in underground manufacturing facilities or constructed wind tunnels in frigid, windswept alpine valleys in Austria. The SS preferred to spend the least amount possible on their slaves to maximize their profits, feeding the men very little, dressing them in thin rags, and providing no medical treatment. The guards motivated the victims to work with shouting, threats, and constant blows and beatings.””