And who does he expect to do all the essential jobs that don't pay anything like enough to live near where the prices are silly high?
I think some people forget that if everyone moved to where housing was cheaper there would be literally no one left in some places to do the "little jobs" like street cleaning, rubbish collection, teaching little Tarquin.
I don't think anyone is suggesting that "everyone" moves. You can address the housing issues by building more housing, the other issue, of course, is employment and if you've got areas where some industry has gone (not so many fishermen or miners required or whatever) then it's perhaps a good idea for people who aren't able to find work to consider moving.... not necessarily to cheap areas but rather to areas that a re more productive and have jobs.