It couldn't be hidden for ever, though. The OECD, usually so full of praise for the UK's competitive economy, has done some repeated finger-wagging about it, and under Broon of the Manse the government decided to get some "back-to-work" stuff going. See that nonsense about "fast-tracking" people into jobs "we know exist". The problem is that most of the long-term unemployed on IB are in wiped-out former industrial regions where the jobs don't exist - and these are mostly people whose financial and psychological energy won't run to a relocation in South-East England. Thirty years of concentration of the economy on London, aka the Anglo Disease, have taken their toll. The way to get people "back to work", is to create jobs they can realistically take on where they are.
I left with my family as a child, but my ex-husband (aged 41) remained until he went to university at 18. There are people from his class at school who have never had a job. I met him at university, and we would have liked to go back to the area in which we were both born once I graduated, but there was no possibility of that.
It may possibly be a little melodramatic to put it in those terms, but effectively our generation were economic refugees within our own country.