"The government of the modern state is essentially an organization of class domination, the regular functioning of which is one of the conditions of existence of the class state.

With the entry of a socialist into the government, and class domination continuing to exist, the bourgeois government doesn’t transform itself into a socialist government, but a socialist transforms himself into a bourgeois minister.

The social reforms that a minister who is a friend of the workers can realize have nothing, in themselves, of socialist; they are socialist only insofar as they are obtained through class struggle. But coming from a minister, social reforms can’t have the character of the proletarian class, but solely the character of the bourgeois class, for the minister, by the post he occupies, attaches himself to that class by all the functions of a bourgeois, militarist government. While in parliament, or on the municipal council, we obtain useful reforms by combating the bourgeois government, while occupying a ministerial post we arrive at the same reforms by supporting the bourgeois state.

The entry of a socialist into a bourgeois government is not, as it is thought, a partial conquest of the bourgeois state by the socialists, but a partial conquest of the socialist party by the bourgeois state."

-Rosa Luxemburg