I very much wonder how they expect "normal" people to survive. It looks like you need to fall quite far into the highest tax brackets just to be able to rent something decent in London, and buying is absolutely out of reach.
Ironically enough, part of what makes those areas desirable is various businesses (such as food service, etc) that rely on low/unskilled labor to function, against which a war of attrition is being waged on. That war is being won and as a result a lot of those businesses have now themselves failed - I've now seen multiple repossession notices on closed restaurants/shopfronts and more and more vacant commercial property, and the high street never really recovered since the pandemic.
As far as I'm concerned I am considering leaving this country once my current lease expires unless business picks up significantly to offset the increased costs (doesn't look likely from what I see). There is no reason to pay the money I am paying here if I can get better food, climate and general quality of life for the same (or even less!) money elsewhere in Europe.