redstrawberry, if it seemed like I was making out that you want people thrown on the street, then I apologise, but I did say that I know that's not what you want.
It would, however, be the consequence of getting rid of housing benefit and tax credits completely, which was proposed on here just before my post. And that's what I was talking about when I said what would people do in the short term - in the time between getting rid of those benefits and the market adjusting.
Housing benefit and tax credits actually often are a short term option, though. Child tax credits have a natural time limit and, unless you have a long-term serious disability, then you will have to look for work (as you should, of course). An awful lot of people claim HB for just a few months before they get another job.
To be honest, on my central London social housing estate the vast majority of the tenants are in vulnerable groups. Because it's an old estate about 70% of the tenants are pensioners, to start with; most London estates are at least 40 years old, so this is not unusual. Disabled people make up a lot of the rest of the tenants. There are working-age people but they're often the children or partners of the actual tenants (and their income affects the tenants' right to HB).
They're really not the right people to jealous of unless you think being old or disabled is great. They also depend on local support structures more than someone who's not actually a long-term London resident because their support structures are more likely to be here. They're not to be compared with someone able-bodied, on a decent wage, and not from the area, because they do have needs that those people don't.
And the thing is all of London is very expensive, not just Central London. Realistically, if you move people out of South Ken to sell their homes, within a year or two you'll be moving people out of Newham and Richmond and Enfield and anywhere that is commutable to London without paying more than minimum wage just to get there and back.
Yes, people should be open to the idea of commuting into the city, but that's really not what we're talking about here - those commutable homes would be taken away too.
When London councils rehouse people away from their borough it's always in other towns - because the other London boroughs don't have enough spare capacity to allow non-residents to apply too - and it just is not realistic to expect someone to commute from Milton Keynes or Southend unless their pay is really pretty good. Like I said, I know people who commute from that far, but their wages allow for it. If they were on minimum wage they'd be left out of pocket after commuting costs. However much they might be willing to commute, they simply wouldn't have the money to do it.