Both plato and aristotle, but aristotle thought that any election-based state turned out in practice, to be an oligarchy or aristocracy, not a democracy (which he define as rule by the poor, with random selection by lot).

Aristotle’s politics books 4-6 talk a lot about this:

http://classics.mit.edu/Aristotle/politics.4.four.html

It’s Plato but it also isn’t a critique.

Plato believed the general idea stated in the post, but he genuinely believed that that was a good thing because that meant he got to be powerful and maintain his influence.

You think so? I feel like faith in democracy™ is at an all time low among liberals too.