Maybe employers need to offer better pay and conditions. Anyone who believes in the market should see that as the obvious driver.
When I retired early I no longer needed to work and it would have taken big bucks to get me back into another poxy office, that I can tell you. And I mean big bucks.
Covid was revolutionary. It taught people a) they could live on less and b) that work is not all that life is about.
Real pay in many sectors has dropped significantly during this government's rule. So it's small wonder if fewer people want to work. It might be an interesting academic exercise to tease out all the reasons behind the change though.
In my view, one factor is that many employers treat their employees with what is little short of contempt. Loyalty cuts both ways. Always has, always will.