Sorry for getting economics and long winded but the ability for rents to rise effectively unlimited is also hitting UK growth (and so tax receipts) which is atrocious compared to other similar advanced countries.
The propensity for younger private renters to move home and get a new job fell by two thirds between 1997 and 2018.
Rents have risen fasted in areas with higher pay, basically eliminating pay advantages to move to areas with productive firms. Or to simplify, the benefits of higher productivity/pay go to existing landlords and home owners at cost to the general economy.
It's not just about London. If you moved from an average job in Scarborough to Leeds in 1997 you'd get a 29 per cent boost to living standards. Today (or in 2023 I think on the study) it would just be 4 per cent.
In a competitive market these higher rents and more demand in productive areas would result in more building, rent increases would be limited or actually decrease more would move to or near productive cities and the country as a whole would benefit.
(As well as this issue, capital has been flowing to existing properties rather than long term investment has been suppressing the investment rate and long term economic growth ).
This of course also means that there is more demand for skilled migrants in these cities and industries. Most of recent long term migrants have been under skilled work visas - not boats.
It's not a zero sum game, landlord versus tenants. The only plausible way for living standards to rise for everyone, for public services to be funded properly, is to have a functioning productive economy.
That means actually sorting out the housing market. Not gonna happen though.