The days of being a low skilled office clerk are dying, but have been for a while, you don’t need someone to photocopy reports say they are sent as attachments, many people keep their own filing system digitally.
So the jobs in the OP will be like hen’s teeth, and where they are there will be candidates who do have a handful of decent GCSEs applying as well.
Many graduates in professional starter jobs can’t buy a house after 2-3 years at the moment. Younger home ownership will largely be determined by family money/inheritance but even that will eventually dwindle so house prices will adapt accordingly.
Whilst school might not work for some college, adult further education might, education can be a lifelong pursuit not something that stops at 16/18.
And as for pensions, so many more youngsters are aware of pensions, or at least their parents are, saving small amounts into the pension schemes for when they start work will make a huge difference, the money will have decades to grow.
The children of today wil adapt as each generation does. Having a work ethic, know no matter what you do (with very few exceptions) when you start out you get the crap jobs on the lower pay, but show resilience, reliability, manners, a get on and do because that is the job you are being paid for not the job you think you should have attitude, take any work in the meantime whilst you naval gaze about making it big, have belief in yourself and don’t give up at the smallest hurdle, these sorts of characteristics are what will help all youngsters starting out. The nice cushy, job for life positions, that are still out there will be given to candidates who are reliable, polite, good team player.
It’s far from being just about GCSE results.