If you're trying to imply the housing shortage only exists because rich people have too much money and are making prices too high for everyone else, that doesn't make much sense. If everyone had the same amount of wealth, you'd still have the same housing crisis. Specifically, there's still going to be the same amount of houses in London, and the same amount of people who want to live there but can't. The problem of housing in London is that there isn't enough for everyone who wants to live there, not that the rich are making prices unaffordable.