And completely understandable once you understand the narratives of both system.

An autocrat is supposed to be "Powerful" beyond all else and typically aren't required to be accountable to anyone so as long as the narrative of "Powerfully competent" holds corruption is merely an part of the narrative.

In democracies the leadership is very much meant to be by and off the people and held accountable under the same legal standard they enforce on everyone else, and when that leadership start to act with the impunity of an "entrenched" aristocracy and stop following the rules the narrative breaks.

And lets not forget that the original feudal aristocracy held their position almost entirely by the mechanism of unchallengeable property rights in an zero sum economy* and we begin to understand why the accumulation of property/wealth into fewer and fewer hands is a almost unmanageable threat to the narratives of western democracy.

*We are returning to an zero sum economy as the planet have essentially run out of unowned/unused resources and that means that modern western economic solutions(grow grow grow) is simply not available anymore.