Also Lord Acton - “Power tends to corrupt and absolute power corrupts absolutely. Great men are almost always bad men, even when they exercise influence and not authority; still more when you superadd the tendency of the certainty of corruption by authority.”
Acton was, by the way, an ardent supporter of the Confederacy. In his opinion, the federal government curtailing the independence of states was a more significant act of oppression than slavery.
Corruption empowers, and absolute corruption empowers absolutely. It seems to me that some people adopt this perspective.