What a load of old tripe, Blackshift!
What puts people off doing manual jobs these days is that they are not brought up in the expectation of ever having to do physical labour to earn a living - and that's true whatever their 'class'.
When I was of late school and university age, it was the norm to earn your spending money working on building sites, in garages, picking up litter or whatever it took. I am from what you would no doubt regard as a privileged background (public school etc), yet I and most of my friends did all these things and more to get money to help us through our studies - student debt is not a new concept.
Just as well we did, as my airline pilot's pay is not enough for me to able to afford to get plumbers and builders in to maintain my house - I have to do it myself!
Scroggs