England has a queen. She's a figurehead, but that's it. The nation is still run by elected officials.
Amidala = Queent Elizabeth (but Ami is more hands on)
Sio Bibble = Tony Blair
It's not exactly the same, but you can read a slight parallel into it.
If you removed the "elected queen" thing, that should be enough without making drastic changes to explain things that don't need to be explained.