From what little I know, Imperial China was a highly functional civilisation, and as you say, any system that can last a thousand years is impressive.

Of course, far more thought would be needed to set the system up. Perhaps the examination-writing body should be separate from the rest of government? Perhaps it alone should have some form of democratic oversight? Would there be a constitution as well? Overall, I think the best thing is to have fluid intelligence as an essential component of the tests - if the tests focus on Shakespeare and medieval Europe then they can be accused of cultural bias, or if they mainly recruit experts from elite universities then the administration process there wields tremendous political power. But Raven's progressive matrices for instance is completely objective.

Anyway, isn't democracy somewhat aristocratic? The current UK prime minister is the 5th cousin twice removed of the Queen, and politicians tend to come from very posh public schools (one school in particular produced 19 PMs). In the US, the Bush line has been described as aristocratic, and it takes a lot of money to run a presidential campaign.