In the democracy we have the people's will as a source of the political power. But here (i.e. in the liberal-democratic model) money replaces the people's will after a critical point of development, becoming a source of real political power. Liberal society could employ a democratic regime at some stage, but such condition is unsustainable. Plutocratic regime is a common result of the wealth distribution in the liberal society. If you have a good propaganda machine then plutocracy is a far more sustainable condition of the liberal society, because a large part of electorate is unable to understand the real order of things, and unwittingly supports the plutocratic regime.
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