Comment by 93po
The statistics they provide are the result of self-reporting by people they interview, and they themselves talk at length about the challenges and errors that may exist in their data and sampling: https://www.ons.gov.uk/peoplepopulationandcommunity/personal...
I think this is inherently going to be a poor way to get an accurate representation of wealth inequality, because if you ask a bunch of really wealthy people worth $100mm+ how much money and assets they have, and especailly when these are very privacy focused people, they're going to either:
1. decline to respond in any way
2. if they do respond, they are very likely to misrepresent and downplay their wealth
3. very likely to have wealth that isn't UK based and therefore wouldn't disclose it to anyone for any reason
4. have a lot of very valuable things, like owning a private businesses, that may not necessarily have a price tag attached to them, and so therefore hard to represent when asked "how much money do you have?"
even though reports throughout years would always have this same issue, i think the problem is that as wealth for the 0.1% rises, that rise is not going to get well represented or collected