"[Brüning] enacted a draconian policy of deflation and drastically cutting state expenditure.[5] Among other measures, he completely halted all public grants to the obligatory unemployment insurance introduced in 1927, resulting in workers making higher contributions and fewer benefits for the unemployed. Benefits for the sick, invalid and pensioners were also reduced sharply.[52] Additional difficulties were caused by the different deflationary policies pursued by Brüning and the Reichsbank, Germany's central bank.[...]Brüning triggered a deflationary internal devaluation by forcing the economy to reduce prices, rents, salaries and wages by 20%."

This made unemployment skyrocket and arguably caused the rise of Hitler.

https://en.wikipedia.org/wiki/Weimar_Republic#Br%C3%BCning's...

EDIT: I'm not sure why all the downvotes, maybe because it looks like I Godwin-ed the thread? I was just paraphrasing the rest of the wikipedia section:

"In 1933, the American economist Irving Fisher developed the theory of debt deflation. He explained that a deflation causes a decline of profits, asset prices and a still greater decline in the net worth of businesses. Even healthy companies, therefore, may appear over-indebted and facing bankruptcy.[57] The consensus today is that Brüning's policies exacerbated the German economic crisis and the population's growing frustration with democracy, contributing enormously to the increase in support for Hitler's National Socialist German Workers' Party"