Managers begin their careers as experts. They then become team leaders. Team leaders become head of Department. Head of Department head, etc are. Some of the experts make it to the Chairman of the Board.
Martin Winterkorn studied metal physics, work as an expert in the research by a Bosch, Assistant of the Management Board at Audi, then, head of quality assurance and the rest is history.
It seems 'normal' to us. But it has a downside.
Under stress and overwork, executives tend to, to decouple from other, their own views to enforce dominant and make "More of the same". You fall back to their expert level early and no longer perceive the actual management tasks. A chain of regression results. But not at all levels. Upper management levels not regressing down, but secede himself upwards. A leadership vacuum is created. Some senior executives respond to this vacuum with control and micromanagement. You begin, to decide all by themselves and leave insecure employees, no own choices meet the.
Please see for: YouTube Winterkorn rattle (secretly filmed at the IAA in Frankfurt 2011 -Hyundai i30 - height-adjustable steering wheel - "there nothing rattles“ -"Why we can't?“ -"We had a solution, but she was too expensive.“ Please note also the measuring tape...!)