I've actually gotten some expert information about this, but the song is actually about one of the kings of france. "thelyricman" was really close here. You see France underwent a few republican revolutions, (The number eludes me) but in any terms they tended to be bloody. I am not exactly sure which king and subsequent revolution this song refers to but I've heard possibly Louis xiv (unconfirmed) The phrase, "Revolutionaries wait; for my head on a silver plate" actually (this is agreed on by my sources) refers literally to the revolutionaries of france who beheaded the king and all who were close to him. Literally they were waiting for his head to by chopped off and presented to them. I got this from someone extremely educated in world history (he's actually a history teacher) so you could trust this answer quite well. Other lyrics of the song, as already said such as "I know saint peter won't call my name" does refer to his tyrranical acts. You can take all of the words literally and they do actually fit this interpretation. It doesn't require a lot of extra thought to figure out how "Oh, who would ever wanna be king" fits into that category. I would like to give good credit to some of the other meanings and I do admit many seem fitting, but in any case there are contradictions and opinions involved and also many far-fetched interpretations on the meaning. But this I guarantee fits the words without fail. Thanks!