Good point. Even here in the (sort of) capitalist US, high taxes (and particularly "progressive" income taxes) are designed to prevent hard working middle class people from getting rich. If they got rich, they would have the time (and the experience) to re-shape our political landscape in ways that the current "elite" wouldn't like.
That is why we have an income tax, not a wealth tax. (Not that I'm advocating a wealth tax.)