30 years ago they built for the people.
I grew up in Gilo, Jerusalem. Everyone owned, even those who came from Russia with nothing, single mums, lower middle class and "shchunot". Now two upper middle class Israelis with a degree can't buy a flat. This generation wants nothing more than their parents were able to achieve in 1980s Israel at their age.
Re London: the 32 councils are what you would call an "Iriyah". They have the local planning and run services such as education and even hospitals ( the national health service is run by local trusts ). The GLA ( Boris Johnson ) is an "Iriyat Gag" running the metropolitan services such as the road network or the underground, and some major projects, but it has to work with the boroughs ( the councils). Between the 80s and 2000 there was no overall framework as Maggie shut down the GLC (Greater Lodon Council) as Livingston was a pain in her side and some things went to central government while others such as large parks were given to The City of London ( a small local authority, a bit like Jaffa in Gush Dan or the old city in Jerusalem.
The council houses were built in the 50s, 60s and 70s under a more socialist economy. Maggie allowed tenants to buy their council homes in the 80 (Yes - Run Cohen got his public housing law from Maggie Thatcher !!!) But not enough new housing was built to replace sold homes, and these days there's a separate thing called "housing associations" so the councils no longer build directly.
The 20% affordable housing demand is a new thing from the 2000s, but it costs the authorities nothing, and the constructors make money despite it.
Also- there are two types of ownership in England and Wales ( Scotland and N. Orland have their own laws) - Freehold - where you own the land and the building, and Leashold - where you only own the building or your part of it, the land still owned by whoever built it. In many private apartment buildings the land owners run the building like an Israeli "Vaad Bayit" but are called a "freehold company" and they run the building as they see fit as they own it, the flat owners owning nothing but the flats themselves. This is how the Bedfords ( Bloomsbury ) still own such a large chunk of the city - they allowed building on their fields, but have never sold the land.