The trouble with many youngsters is they don't want to start at the bottom, as if it is below them. They don't want to sweep floors or the do the photocopying or 'serve' anyone.
They don't realise the way to working hard is sometimes having to start at the bottom and work your way up.
Probably because increasingly it's not. And a generation or two ago, there would at least have been a job and some affordable housing available even to people at the bottom. Increasingly there now isn't. Anyone who has started at the bottom and worked their way up started long enough ago that young people had much better options than were available now, not a choice of zero hours or zero hours or faux self-employment.
And the fact is that people often, when presented with their place at the bottom of the order, do rebel. It isn't universal amongst humans by any means, but it's also not sufficiently unusual that anyone should actually be surprised by it. People don't see any incentive to tow the line, so they don't. That's how it is sometimes. Lots of people don't fancy eating shit so they don't.
If you know a bit of British social history this isn't surprising. The postwar decades saw the most equal period in British recorded history, in terms of the gap between richest and poorest, and it also saw some of the biggest strides in respect of the NHS, social housing etc.
A big part of the reason this happened was fear of the revolution. The British working classes were pacified, given an incentive not to overthrow the system, because you could have a steady job and a home and a pension and the NHS. Now that this particular social contract is breaking down, and some people understand they have less to gain from participating in society, of course they're going to be less likely to.
That's not to say there are no other factors, of course there are. But given those that I've outlined, some of this is inevitable. It's just what happens when there's increasing inequality and the rewards for participating dwindle away.