People coming in should have enough money for their flight home, and this could be kept by a government agency. If they lose their job they would then be able to go home, and wouldn't be trapped here unable to support themselves
Let's just look at that in the mirror, shall we ?
Mr and Mrs Smith and brood go to live and work in (say) Spain. They are there for 3, 4 years, and build a life and kids are in school etc etc.
Then Banco Pensionista has a bad run, and jobs go.
Mr & Mrs Smith plus brood+1 (because they had a child while working at Banco GrandeFuerto) find the Spanish government cashes their "Britsback bond" books them all tickets on the next flight to Heathrow.
2 hours later, we have a family of 5 dropped on the UK doorstep. No home. No job. (Presumably) No or little money.
This thread really has attracted the brightest and best minds of Mumsnet, hasn't it.
Unless I misunderstood the PP (reads quoted text very carefully).
No, they really did say and mean that.