Denying the people's choice is anti-democratic in theory. There is no way around that principle. That being said, gerrymandering has done so much damage to democracy in the USA, that term limits would reduce the damage. Of and in themselves, term limits are not good for democracy. The Roman Empire cannot be reasonably characterised as a plutocracy. At best, the last two centuries of the Republic maybe, but not the Empire. Sure the plutocrats found the Empire profitable, but as a 'class' they didn't run it. The military ran the show and that was always the 'equestrian' class (indeed, the victory of Caesar and Augustus was that of the populares not the optimates - the plutocrats clearly sided with the latter and Emperors tend to have long memories.). I only have addressed this Roman issue in detail here because you have cited it as some justifcation for term limits. I think that argument is logically absurd.