The truth is social housing has taken a nose dive in terms of numbers and quality over the decades. My parents retired to a modest estate of large 1930s council semis with big gardens, many of which had been turned over to allotments. My friend's mother lived in a mid-1970s council house built on a block plan of appallingly low quality which has since become a byword for criminality. The taps were made of white guttering plastic roughly sawn off at the ends. I imagine few people who could afford to buy would want to remain in the latter, while the former were eagerly bought up for £6000 under right to buy! Not close enough to replace the housing stock even in the 1980s.The solution for me is to return to building large numbers of good quality social housing estates which can then be occupied under right to buy terms with the obvious statement that any RTB funds be reinvested in more housing stock.
In East London there are vast new private housing developments, many of which have a nominal social housing component to get through planning. Those fortunate enough to have such a council house are living quite literally like millionaires, whereas in another part of the country the standard of living for council tenants might be barely above survival levels. Until there's an agreed notion of quality, social housing is a complete lottery.