The role of the liberal class is that it acts as a kind of safety valve to make incremental or piecemeal reform possible, it also sets the parameters by which acceptable debate is permissible, you are allowed to critique the excesses, but not the virtues of those that carry out that project. Once you attack the motives and the virtues of the power elite, you are immediately pushed out of the mainstream, Chomsky's biggest enemies in United States are not the far right, they don't even know who he is, it's the liberal class, because Chomsky exposes their complicity with the power elite.