TL;DR total wages rose because people worked longer hours. The economy was forced into, effectively, a war economy upheld with deficit spending (like America was doing with the New Deal, but with tanks instead of roads).
The scam continued with the annexation of Austria, Czechoslovakia, and the stolen wealth and enslavement of the first Holocaust victims paying those debts.
TL;Dr;tl;Dr
They paid for their tanks with IOUs and then stole a bunch of gold with the tanks