The United States of America is clearly not a plutocracy, it is not controlled by a wealthy ruling class, it is a democracy where essentially any U.S citizen can run for public office and vote!
Yeah, right. Go find an accountant to tell you how much it costs to get elected to any level of State government, multiply it by 20 for Senate or Congress and by a further 100 for President. There are no poor men in the Government of the United States because only the rich can afford the price of the ticket for admission. Representative democracy is but a shadow of the ideal which we are supposed to cherish and evangelise for at the best of times. When it is so utterly unrepresentative of the vast majority of its own people it becomes nothing more than a mockery. Plutocracy is as plutocracy does no matter what it says on the tin!