Quality is everyone's responsibility.
Divide responsibility and nobody is responsible.
The most valuable "currency" of any organization is the initiative and creativity of its members. Every leader has the solemn moral responsibility to develop these to the maximum in all his people. This is the leader's highest priority.
I should estimate that in my experience most troubles and most possibilities for improvement add up to the proportions something like this: 94% belongs to the system responsibility of management 6% special
A manager of people needs to understand that all people are different. This is not ranking people. He needs to understand that the performance of anyone is governed largely by the system that he works in, the responsibility of management.