This is an extension of the left’s desire to use the power of the state to punish (beat, torture, kill) their ideological opponents.
This is an indirect way of implementing this desire. You have a government protected group do the actual “work”, with the implicit threat that anyone resisting will be subject to sanction by the state.
Like people who have vicious dogs - the people themselves don't want to sully their hands by assaulting others directly, so they have biting or barking dogs to cause the harm.