H'm. You must have some interesting experiences in Germany.
I have never been there and my experience is limited to meeting some abroad, in England: prisoners of war working there on farms; and later meeting others at university there; and in various other settings in England and in other countries,;none of these meetings being in the financial sector. IMO the Germans are by far the hardest, most efficient and most reliable workers in Europe, and it comes naturally to them. Their aggressiveness and arrogance also comes naturally, the only saving grace is that they have reasons for the arrogance.
Hm.. Interesting.
My experience is quite different. The finance sector is stuffed with people who are intelligent, but lack imagination, and want to follow 'a plan'. The organisation is the strategy, the strategy is the organisation. The IT people are more flexible, more arrogant, and see themselves as the new elite of a new world order. They work hard when they work, but not for very long.