Ok, but...

It's hard to argue too much with the analysis, but there is a problem.

Even supposing the jobs existed, not everyone is capable of becoming a degree-qualified brain worker. Unless we dumb degrees down even more than the UK already has, which would mean nothing changes anyway.

Or, to put it more bluntly, what are we to do with the left-hand side of the Bell curve?

There are hundreds of thousands of good, capable, hard-working citizens who need something worthwhile to do. If they don't find anything worthwhile to do, there will be trouble. Saying to them "tough, Poles are cheaper" may be true, but will not avert the trouble.

I don't pretend to know the answer, btw.