I’m not convinced, at least in the UK it’s been a very very long time since mortgages were accessible to the average salary.

I’m not saying there isn’t a problem but I’m not sure this would solve the problem right now. In the UK something like 70% of housing is mortgaged or owned (by the occupier)… most renters say the biggest barrier to getting a home is not the mortgage affordability it’s saving for the deposit. Indeed when I bought my first home 20+ years ago I needed my parents help on that front. Where do people live between leaving education and saving up for that deposit, whatever size it is?