London is a very international city, and the wealthy people who own property in the central areas come from all over the place.
I think he's arguing that Charlie counts in the "native Londoner" bucket.
BTW, don't trust the Sunday Times Rich List estimates of the Monarch's wealth. They changed their methodology after the first list when the palace complained that the Queen came out on top.
> I am certain that in the aggregate the relationship between wealth or income and length of tenure in London is positive.
I reckon people who were born there and didn't get a London-appropriate degree are unlikely to have amassed wealth. (Excepting Right To Buy, I suppose, but that's more Right Time than Right Place).
OP's point (which I parapharase as "there are two Londons") strikes me as blatantly true, and I've got the impression from art that 'twas ever thus.
> their monarch
You're not British, maybe? Have you spent much time in London? (I was in the "graduated from UEA" bucket above - I've left now, as people like me tend to do as they get older).
I am certain that in the aggregate the relationship between wealth or income and length of tenure in London is positive.