Comment by teamonkey
Gini coefficient usually only measures income inequality. Wealth inequality is hard to measure for various reasons but…
https://equalitytrust.org.uk/scale-economic-inequality-uk/
“for the UK as a whole, the WID found that the top 0.1% had share of total wealth double between 1984 and 2013, reaching 9%.”
“If the wealth of the super rich continues to grow at the rate it has been, by 2035, the wealth of the richest 200 families will be larger than the whole UK GDP.”
Etc.
The super rich aren't the problem. 200 families is too few to have any meaningful effect on the housing market.
By all means tax them til their eyes bleed, but it'll mostly just make people feel better rather than being a useful contribution to public finances.