By 1933, most Western economies were moving out of the Great Depression, even if the Netherlands - only economy compared here (wouldn't the UK or France be more interesting comparisons?) - was a bit slow. Further, the economic boom of 1933 is probably due to the government prior to Hitler's enacted several large scale projects, like the Autobahn, to help boost the economy.
I'm not saying Schacht wasn't brilliant at managing German finances under severe limitations for rearmament, but the article seems to hint it was basically Schacht alone that ensured the economic boom of 1933-39 in Germany.