This.
People are fed up of giving their whole lives over to someone else's profit margin and getting the bare minimum in return, they're fed up of being treated like a necessary evil rather than an asset.
And many are sick of the abuse directed at them by the general public and the attitude "But you get paid " to justify it.
And so many employers are sticking their heads in the sand, refusing to change and then wringing their hands and whining because they can't get and keep staff.
So many jobs have been put down for so long, the people doing them told they're unimportant and not worth anything much, treated badly and demoralised, paid the bare legal minimum and expected to give their all and be grateful for the opportunity - and now there's surprise that no one wants to do those jobs and be treated like that.
Even on here, you see "Get a better job" as a response to poor pay and conditions in the workplace instead of recognising that treating people decently will encourage them to engage and do a good job, and stay in that job, well many have done exactly that and left the workforce all together or moved on to somewhere they're treated fairly, and there isn't a queue of people waiting in the wings to take their place as was always assumed, and this is the result. As a society we've devalued so much that we rely on.