Why must some people be so paranoid all the time? I'm in the middle of reading the book right now, and I thought that the beginning of the book between Fudge and the PM was hilarious. And I really didn't see any swipe in there, for all I know she could have been talking about the President of India. Or both the President and the Prime Minister could be made up...
Seriously, it's a popular fiction book that's meant for enjoyment; there's no need to search for perceived slights at every turn.
I'm not making this into more than what it is, but I certainly have an opinion as to why she did it.