That is the definition of classic antisemitism. There were some wealthy Jews in Germany in the 1920s and early 1930s, as there were in most European countries, but there were also many more wealthy families that were non-Jewish. Thyssen and Krupp are two examples of important (and very wealthy) German families than ran significant manufacturing businesses during this period. (They later merged together to form the present-day company Thyssenkrupp.) Leading politicians in the Weimar era were almost entirely non-Jewish. Germany had an important Jewish politician in this era, Walter Rathenau, who acted as foreign minister briefly- but he was assassinated in 1922. Jews made up less than 1% of the population of Germany. Not all German Jews were wealthy. The ideas that Jews are primarily wealthy, and that they use cunning to control governments/economies/etc. are classic tropes in antisemitism.