According to the Peter Principle:
In a hierarchy, members are promoted so long as they work competently.
Sooner or later they are promoted to a position at which they are no longer competent (they have reached their level of incompetence), and there they remain, being unable to earn further promotions.
The obvious deduction is:
In time, every post tends to be occupied by someone who is incompetent.
Now I understand a lot of bizarre things happening in our beloved country every day…