Most of what was produced was armaments. If you never use them, they are wasted money. The reason why Germany had the economic miracle after the war was the rest of the west heavily invested infrastructure and consumer goods. The Nazis lived by the motto "Guns Before Butter".
I don't think you understand what Socialism is.
Again, you are working off distorted facts. Most Germans never got to own a "Volkswagen". Most of the Public Works projects, like the Autobahn, were started under previous Weimar administrations. What Hitler did do was borrow ridiculous amounts of money to buy armaments.
Biden's spending (as a percetage of GDP) was nowhere near what Hitler was spending, that's kind of the point.
Keep in mind, Germany also owed war debts from World War I, and Hitler was borrowing massively on top of that.