London has been doing this with Essex for years, disasterous affect on services (schools, NHS, social services etc)
Its not really news, My borough (not london) paid another town to take a load of it's social housing off its hands, part of a "regeneration" scheme to clean up a dodgey area - course it only ghettoises people more in the place they're sent to but other town gets money in the short term so = happy, this town makes some of it's social problems disappear without having to solve anything so = happy 