"Against a national average of 12%. Do you really think that is either desirable or sustainable? No, don't answer that question, I know what you think already. The State must own everything. Just like in the Soviet Union..."
That's called crafty conflation you know - the Nazis had trousers, the Nazis were evil therefore trousers are evil. Clearly large estates are sustainable, they've existed for decades and they're existing now. The sustainability of large estates is rather the point of this website.
Correct me if I'm wrong, but your solution to the underprovision of social housing is to sell off what little's left? How's that work then? By driving out the poor people?
So we can improve social housing in London (for your ideas and ambitions are clearly entirely London-centric) by gentrifying it out of existence and shipping all the poor folk off somewhere far away and unspecified. You're not Dame Shirley Porter are you?