EFFICIENCY AND HONESTY.
When Germans do business they seek to create long-lasting relationships that are based on trust. In fact, trust is perhaps the highest valued trait in German business culture. It even ranks above monetary aspects like the price of goods and services.
The term German Angst therefore has nothing to do with fear. It simply refers to uncertainty avoidance, the reduction of cost and the refusal to waste time.
Trust as a key factor in business also implies a high level of transparency. Germany ranks 9/180 in the Corruption Perception Index, a ranking that no other country with a comparable size and GDP has ever achieved (by comparison, France ranks 23/180).
Indeed, the clear-cut separation of business and private life is deeply rooted in German culture. What may appear to outsiders as humorless in actuality is just that: a clear division between business (serious) and pleasure (joyful).