Blame Thatcher and the Right to Buy, essentially large scale privatisation of housing with millions of shareholders. Offer bribes to tenants, who can blame them for falling for it?
Except their kids grow and join the council housing list, whoops! no houses! Not to worry, let's call in the private sector, they can fill the gap! Oh, no one wants to be a landlord. Not to worry let's take away secure tendencies and rent controls. Let the market decide.
Which brings us up to the late 1980s. Next chapter the stigmatisation of social
housing and it's tenants, with a brief trip into how many billions we have paid out in housing benefits to private landlords, and a side serving of ,'all the council housing is going to immigrants' woth documentary evidence to contradict this.