Hitler got entrenched in power because his economic policies _worked_ in 1930-s. They were broadly Keynesian: state spending to stimulate infrastructure (for the military) and manufacturing (also mostly military). This led to economic growth that people really felt in their wallets: https://commons.wikimedia.org/wiki/File:Economic_development...
And so it resulted in a huge upswing in Nazi support, enabling Hitler to stay in power. People really _loved_ him.
This doesn't work all that well backwards. If peoples' lives keep getting materially worse, it's hard to keep blaming it on "the others".
Everyone learns when they're punched in the face. The question is what less will be taught? So far he's been able to tell them everything is someone else's fault, but when he's in the driver's seat, who will he blame? And will they believe him?
