A manager of people knows that in this stable state it is distracting to tell the worker about a mistake.
It is a mistake to assume that if everybody does his job, it will be all right. The whole system may be in trouble.
People need to know what their jobs are.
Hard work and best efforts will not by themselves dig us out of the pit.
Eliminate numerical quotas, including Management by Objectives.
When a worker has reached a stable state, further training will not help him.