... on the duties of a king:
Note 1: The subservient role adopted by the King of Barataria well suits our current Leader.
But the privilege and pleasureNote 2 (less political): When writing The Gondoliers, Gilbert was full up to his eyebrows with the attitude of his principle players. He wrote the libretto with 2 tenors, 2 baritones, 2 sopranos, and 2 altos - not giving pride of place to either in any pair, thumbing his nose at what had become in his mind the much UNdeserved reputation of his players.
That we treasure beyond measure
Is to run on little errands for the Ministers of State.
[Gilbert was not a particularly pleasant gentleman - very litigious, seeing slight towards him at every turn. His widow was said to have remarked, "Oh, yes, life has been much more enjoyable as Sir William Gilbert’s widow than ever it was as Mr. Gilbert’s wife!"]