There are two problems here. First, the concept of ruling class is too wide, while the part that determines the national policy can only be a few. In a modern society, big decisions are very complex and need to be kept secret; so the state cannot be led by the majority. Ain’t no laws when you’re drinking claws shirt. For example, the leadership class, actually the party of that class, rather the Central Executive Committee, is exactly a minority (like the Politburo) leading. Second, in the modern society, the classes are clearly differentiated. In capitalist countries, economic growth leads to the social welfare welfare, working-class society is no longer the proletariat like Marxism, but a significant part has moved into the middle class, organic The bourgeoisie also divided into industrial and financial bourgeois, having different roles and contradicting each other.