"Power attracts pathological personalities. It is not that power corrupts but that it is magnetic to the corruptible. Such people have a tendency to become drunk on violence, a condition to which they are quickly addicted." ~ Frank Herbert, Chapterhouse: Dune
It takes the will of a saint to be incorruptible — to not become addicted to the exercise of power. Those who do not desire power, like saints, may have it thrust upon them.
Even when left to own devices, a person can only exercise power within a society that has desires, wants, and fears. The whole society would need to be incorruptible. This is improbable. In the unlikely case of such a pure society, it would also need to be incorruptible when in contact with "the other" — peoples, species, events, and ideas. This is exceedingly improbable. So, the whole of existence would need to be incorruptible.