The U.S. though is a Republic.......meaning we we elect people to represent our thoughts ....a Democracy is "two wolfs and a sheep asking whats for dinner".........but what Plato would insinuate today is a Technocracy which what has been building up the last few decades and years especially.....
Technocracy: "It's the Stupid Economy" - (1994) - YouTube
Well, Republicanism was established for the same reasons Plato outlines- to actually prevent "the people" in a larger sense, from having too much control, because the belief was that they did not have the expertise to govern and so the results would be disastrous overall. Most of the founding fathers were ardent republicans, not democrats (in the sense of being for more direct democracy.)