You miss the point. Many of them may well learn a trade. Does that mean that they shouldn't ever want to perhaps do something else?
That's what my younger brother is doing. He learned and plied a trade, now he's doing a law degree. Should he go back and work on sites for the rest of his life rather than seeing if he's got it in him to do something different?
In terms of "the trades", we don't have a significant "skills hole", what we have are companies who'd rather hire in cheaper labour from the newer EU states, and then whine like fuck about a "skills gap" as an excuse for not wanting to pay a living wage to all those people who've done the apprenticeships, got their papers, and want recompense commensurate with their labour.
"Do what you're told, be a good citizen, and you might one day earn enough at your trade to afford a family and decent housing, peasant".
Fuck off.
You mouth cant phrases like "beneficial to society", but what you mean is "beneficial to the maintenance of the status quo, with everyone in their pigeonholes.
And just where is this reality, outside of your head?
The government has control of the education system. Blaming the LEAs is like blaming the school cleaner when the school lino wears through.
Class over-arches all other social cleavages. In other words, whatever your skin colour, if you're working class you get a worse deal, both practically and in terms of life chances. If you're black then on top of your class giving you a worse deal, your colour does too. Anyone aware of this should (and generally do) strive to make the situation better for all. Remove or ameliorate the causes of crime, and crime falls. That's a basic criminological verity that both the left and right strands of criminology accept.
As for your thesis of blacks as sacrificial lambs for the furtherance of class struggle, what sort of demented halfwit are you, to even think up something as conspiratastically-horrendous? I want to see everyone treated the same, based on their common humanity, not treated differently based on their skin colour.
Masturbating when you wrote that, were you?
If (and it's a contentious point unsupported by demographic flows over the last 60 years) "most of them got a trade, moved out to the suburbs and then started voting Tory", then why is the urban working class still larger than the suburban and rural working classes? You're talking about a minority of the working class (or, more accurately, the "lower middle classes"), not "most" of them, and in terms of changed voting patterns, your claims are again not supported. The biggest change in voting patterns has been from "tribal" voting to "pragmatic" voting, which has benefitted both Labour and the Tories at different times.
As for dead Germans, the accusation of Marxism was juvenile 50 years ago, nowadays it's mostly acknowledged by everyone except the sects that Marxism is a good system for analysing society and economy, but not a particularly helpful ideology.
What the fuck are you on about? You've either been sniffing paint-thinners or reading the intellectually-garbled junk over at Harry's Place again.
Or, better still, alleviate the causes of crime so that staying in education, and learning a trade seem like a better option for actually getting some sort of employment, rather than kids having to grow up in a system that rubs the rewards of crime (from the local dealer's car to the banker's mansion) in their faces from when they're old enough to understand the media.