The entropy can only increase and nobody with any modicum of power has any incentive to fix it.
And it's a constant feedback loop because more investment goes to London and therefor it attracts more money and because there's more money it attracts more investment.
From a personal standpoint: I'm an above average earner but my quality of life in London is substantially worse than anywhere else I'd live (probably excluding San Francisco), we're coming towards a time where only the wealthy can live there, and the proles who actually do the hard work (cooking, cleaning, assistants, low-mid level employees) will need to be shuttled in from further afield.
The reason I mention that is because I was nearly paying 1.3k/mo for someones basement room in 2011, that same room is now on the market for twice that, I can't imagine how anyone can be comfortable paying that much for such a basic accommodation.