There is such thing as a ruling class. Every state has a ruling class. That is the reason states exist, for a ruling class to subject to their will other classes, and in the modern capitalist state the ruling class is the bourgeois class, which uses state power to subject to their will the proletarian class, as well as the other working classes that are slowly being turned into proletarians. This is Marxism 101. I would suggest reading more Marxist theory on the subject.