Whoeveryouare and are you the same anonymous as the previous anonymous?
I think you wil find that a large proportion of the privately owned, falling into disrepair, family sized homes on the former social housing estates are privately rented. For instance over 60% of the homes brought under RTB in Westminster are now owned by someone other than the original tenant.
L&Q, to quote the great post-porterist slogan, 'every little helps'. If the scheme enables people to avoid homelessness and exploitation at the hands of Dame Shirley's greatest pals, then it is worth it as a stop gap until sanity returns and social housing is built on a scale to stabilise house prices and rent values, as well as ensure that the waiting list is small.