I have often been in 2 minds about it. Friend of mine bought her council house when RTB was first introduced. She had lived there her whole life - nearly 40 years - and is still there with no intention of selling.
But there has been too much fraud with RTB - I have seen a TV prog. where property speculators made an 'arrangement' with a tenant to fiddle the system in order to be able to sell at a large profit later, and apparently it happens a lot.
When it was first introduced I don't suppose anyone ever imagined that council properties in certain areas would become so sought after and expensive.
I certainly think this govt. should put a stop to it, or at least restrict it severely, when there is such a shortage of social housing, and private renting in many areas is very expensive, with very little protection for tenants against bad landlords, or LLs who simply decide to sell at relatively short notice. After their 10 years in office, I can't think why Labour did not do it. They are only too happy to bang on about the evils of Thatcherism, but did not take this obvious step even when house prices began to soar to crazy levels.
I think I read somewhere that the annual. housing benefit bill is now around £23bn. To me it is a national scandal that so much of this vast sum of money goes into the pockets of private LLs, instead of into maintaining and increasing social housing stock. What is more, it makes absolutely no long term financial sense. (Except for the LLs who are making money, but of course an awful lot of MPs, including Labour ones, have buy to let properties.).