You sound like my Greek relatives!
"The mere elimination of the need to sell government services to voters will do wonders to the quality of government we are getting."
So far as I can see, corruption in monarchial style governments has been as bad, if not worse, than that seen in republics. As for pols selling out to the "interests" who pay the bills, well that's been going on since the Athenians came up with the idea of democracy. In a republic or a constitutional monarchy politicians are either the voice of their constituents or people elected to lead because of their personal qualities. For me, I'll go with Edmund Burke on that one, but the tenor of the times as we see in the actions of virtually all political parties in the West has clearly moved away from the Burkian ideal.
I will say that I do see a use for monarchs beyond being mere tourist attractions. In countries like Bulgaria, Romania, Cambodia and Laos (and Spain some years back), a sovereign can act as a uniting symbol of the nation and all the people as a country struggles to establish a free society. As for established stable countries, well I wouldn;t want to give up my rights in the hope that some sovereign and his barons could do a better job than I and my peers can do.
*Yes. I can see the now Prince Charles leading Perfidious Albion into officially embracing Islam. I think King Dhimwit and Camilla in a Burqa (YES) will look fetching on the cover of Time as the couple of the year and the idea that St. Paul must be renamed Usama Bin Laden Mosque will be happily embraced by the Diversity Dons at Oxford