All states are authoritarian, as every state is the extension of a given class. The only way to get rid of the state is through socialism, after revolution, and gradually sublimating all property into collectivized ownership until class no longer exists, ie communism. The administration, management, social planning, accounting, etc will remain while the need to exercise authority will vanish along with class. Until we get there, it is better for the proletariat to be in control, ie socialism, than the bourgeoisie, ie capitalism. The UK is under bourgeois control, while the PRC is under proletarian control.

The extent to which a given state exerts its authority depends precisely on the given conditions and circumstances a state is in. There is no latent desire for exerting authority at the helm, there are class dynamics and reactions to those changing relations through class struggle. Nazi Germany and modern Germany are both authoritarian and both serve the bourgeoisie, but Nazi Germany was in economic crisis and needed to violently suppress the working class to retain private property and bourgeois control. Those same circumstances do not exist in modern Germany, but if they did, the state would be just as willing to wield its authority the same way if the bourgeoisie felt it necessary.