Just watched this, and for something that was allegedly a retrenchment for Lang and the studio, this was glorious fun. Long story short,
Metropolis nearly ruined the studio due to its cost, and they were unable to break their contract with Lang, so they demanded that his next picture cost a lot less money, with the additional pressure of making a profit. What we get is proto-typical James Bond, complete with its own Blofeld, except more interesting and even more compelling thanks to the production's historical context and story elements that feel cheekily contemporary at the same time.
The bad guys make a bank their home. The lead villain is even the bank director.