Thank you GandTea- exactly.
And someone who leaves school barely able to read and do basic maths, cannot just be trained to become a nurse or a doctor- or an IT specialist. In the old days, they would find employment in mines and factories- but now there is no-where for them- or jobs they just don't want to do.
BTW, in my region of Switzerland, famous for its precision engineering and high-end watchmaking- we have the same problems, to some extent. Un-employment is only about 5%- and we have 1000s and 1000s of French people commuting into Switzerland (we call them 'frontaliers' border workers) to work here. And many say, why do we give them the jobs when we have 5% unemployed- and the same holds true. You can't take a young person off the un-employment register to do the job of a hghly qualified, trained and experienced watch-maker. And they would be wither, totally unsuitable, or totally unwilling, to work in old people's homes, etc- and they just refuse to do cleaning jobs and the like.
Our local GVT is doing everything it can to train those who show some ability and willing to do some of the jobs, but in many cases it proves expensive and a total waste of time- although there are a few happy endings, for a few.