I get what your saying but if we continue to get pay freezes (fair enough really) I don't really want to see eveey other career get humongous payrises. This then drives up inflation and all of a sudden I cannot afford the mortgage.
Decent pay is one thing but 56k for lorry driving is too far. It took us as train drivers many many years to slowly and controllably get to where we are paywise, it certainly didn't happen overnight. The economy is already being run by total clowns, things have the potential to get much much worse yet.....
I expect what will happen is the current spike in wages will draw more people into the industry, which will then have a cooling effect over time as the supply of HGV workers increases (as you rightly say a job that can have people trained in three weeks will be more vulnerable to spikes than jobs with much longer training periods).
We probably as a society need to accept that we will have to pay more for certain things, simply because we’ve become over reliant on certain industries paying appalling salaries and we are all guilty of that as I’m sure everyone on here uses some kind of gig economy service.