German citizens, including the aristocracy, workers, intellectuals, and industrialists became totally dependent upon the Nazi government. Adolph Hitler got the nation's currency and economy under control. Hitler's leadership rebuilt the nation's productive economy (including huge production of arms, tanks, airplanes, etc.) with financial help from bankers in England and the USA.
As others have stated he set about rearming Germany and He printed new money, this coupled with his adoption of a system of "Keynesian Economics" (John Maynard Keynes) simply put this is a system of economics that allowed the wages people earned to be used to add further growth to the Germany economy.
For example someone who worked in an aircraft factory would have money to spend on luxuries such as a new home or washing machines or radios for these homes. this would in turn lead to the companies producing radios or washing machines or building houses to employ more people to meet demands. thus ensuring these people in factories then had wages to buy other goods. so by having full employment more people would pay tax and so the German government benefited which gave them money to further strengthen the rearmament programe and the German economy.
This is was why Britain and France had adopted out a policy of Appeasement with Germany for so long they wouldn't take the risk that Hitler took by aiming for full employment instead sticking to pure folly of the old capitalist ways of keep tight control of their respective economies.
footnote
In 1928, the Nazi Party had nearly gone bankrupt as a result of the spending on street parades etc. which had cost the party a great deal. Bankruptcy would have automatically excluded them from politics - they were saved by a right wing businessman called Hugenburg who owned a media firm in Germany. He financially bailed them out.