She is a celebrity and also an American, so I don't understand what the fuss is all about when her celebrity friends put on a traditional American party for her with certain celebrity trappings. It doesn't play well in the UK because the UK public has bought into the idea that having the riches of Croesus is fine as long as nobody is ever reminded of that.
Which is worse - reminding people that you have pots of money at your disposal as do all of your friends, or keeping your profile low key while at the same time being the world's richest woman? The poor and disadvantaged are not seeing any benefit from either case.
The whole RF enterprise is based on very delicate management of a huge hoax, namely that it is a good thing to have a figurehead who is emblematic of the country who must be maintained at considerable public expense, that their charity work is somehow important and necessary, while in the background the rich squirrel their money away untaxed and tax rates squeeze the poor and the middle class. If taxes were sufficient to fund public services there would be no need for charities to go cap in hand to anyone.
None of that puts me off commenting on their sartorial choices of course, but it's an illusion that anything other than massive amounts of money separates us from the RF, and I for one am grateful to MM for illustrating that.