1)no, it was Livingstone, and it was probably the most major policy that changed London. Instead of all the derries and hard to lets simply decaying, whether squatted or not, they were handed over to enthusiastic people who wanted to make homes out of them. For a couple of years almost every street in London had a skip or two as that enthusiasm translated into regeneration, and so, as inner London began to be seen as a good place to live, gradually the exodus reversed. Of course, that popularity later turned to gentrification, but that was a failure of later policies, not of the original giveaway.
2)of course, that's indisputable,
3)they still would, my parents want/need a sheltered bungalow and their HA ought to have the 3 bed back for a family that needs it and can cope with the stairs and garden, but the mechanisms are way too cumbersome, so they've been getting increasingly frustrated over a couple of decades.
4) I wonder whether he'd have sold up and bought closer to his job if he'd had that option?
5) I reckon people like individual control, and understand the costs & benefits of bigger mortgages, shorter commute, bigger or smaller rooms or gardens... there's a personal equation about money -v- quality of life which no bureaucracy has ever really managed to address. I think that's the fundamental reason ownership is so popular, the financial gain aspect isn't the major motivator except for the sensationally greedy few.
6) I don't think I was, but it's discussed and focused upon far, far more than is warranted, and too often the discussions are one dimensional, which gives it an importance way beyond what it actually means.