Walking around the residential areas of Chelsea or Knightsbridge I found it to be some of the most boring places in London. Beautiful houses and no one on the streets, pedestrian hostile roads, generally boring perfection.

I think optimising the city for the wealthy when these wealthy are not invested in the community kills the spirit of the city. London doesn't have particularly beautiful nature or weather, so if you make it about perfect streets and expensive buildings you can build something much better somewhere else. What London actually offers that is extremely valuable is a great culture and institutions and all these rich people who occupy a place in London without being in London are undermining it.

London has much more to offer than hiding the elites money, just as the Switzerland. These are advanced communities that has a lot of more going on for them beside accommodating the rich people of the world. The accumulated wealth in these places is not like the wealth in Silicon Valley, it is stale.

IMHO the dilution of the artificial wealth saturation will result in talented people having their impact amplified.