Have they gone home from the USA and Australia as well as Germany and France ? Pinging, fewer HGV tests and low wages might be part of the explanation here as well
I understand your point, however not sure where in the post you were replying to it said about people going home (post below).
ICE road haulage? Perhaps. But road haulage as a whole? Not by a long shot.
And that is still mostly the way it goes. Rail freight is only really cheaper on long, consistent flows that are geographically well suited to the rail network. And even there, that is only because it is indirectly subsidised - as freight operators don't pay anything remotely close to their fair share of NR's fixed costs.
That's only part of the problem. The bigger issue is that driving tests were paused by the DVSA for a long time. Hence there is now a backlog of candidates waiting to do a test.
Not all that dissimilar to what has happened at a lot of train companies. Only, replace "tests" with "route/traction knowledge".
The best explanation on this I've heard was that by leaving the EU it has impacted on how easy our robustness in our response to there being a wider issue with a lack of HGV drivers.
The other factor is that with complications with movement of goods it is going to discourage haulage companies from the EU from sending lorries here as it's harder for them to be sure that they will have a load to come back with.
As such, whilst leaving the EU clearly hasn't caused the issue it's made the issue more obvious than it otherwise could have been.
Probably one of the bigger impacts is the rise in couriers which will be more attractive for some than long distance driving (for instance you can go home to your own bed at night).
Now whilst an increase in drivers pay is going to have some limited in the cost of things out is likely that it will also increase the tax take by HMRC, as a driver being paid (say) £40,000 rather than £36,000 would pay £9,160 in taxes (including employee NI) rather than £7,880.
However, as I've pointed out before, we have an aging population. That means a falling number of people working, which will mean that making being a lorry driver more attractive will impact on other roles. They in turn will need to change to ensure that they have staff or have implications. In reality many more jobs will need to be automated to match the falling numbers of workers.
In part we are seeing a falling population due to fewer children being born. Some of this is obvious (such as it's less easy for same sex couples to have children than hetero sexual couples, in its simplist form a hetero sexual couple can have an unexpected child, that's not something which is overly likely with a same sex couples) some of our less so (more people needing assistance to get pregnant), however as those without children age they have less need to work full time and so that's likely to impact on the working population as well (simply, once your mortgage costs fall due to inflation reducing the impact of them, as well as being "smaller" due to pay rise and there's no need to have to have a given number of bedrooms to accommodate your children, then some may opt to work less to have more leisure time).
As an example if you can afford to work 4 days a week, then you can have a long weekend every weekend. Now whilst that will reduce your total pay by 20% it's not going to reduce your take home pay by that much, especially if it brings you back below the higher tax rate threshold. Which is likely to have been highlighted to those who were furloughed and managed to pay their bills.
Again that's going to increase the need for more staff across a wider range of industries. I don't know about others, but my LinkedIn page keeps getting (almost on a daily basis) messages from companies after staff and my current employer is looking for more staff and failing to find enough.
As such driver shortages are just the canary in the coal mine, the first thing that many have noticed but likely far from the last thing that will happen.
It used to be location, location, location or even education, education, education, now it's likely to be automation, automation, automation.
Those industries which fail to reduce the numbers of staff that they need will find that others will improve their pay and conditions to get the staff that they need and will then need to follow suit.
Conversely if they do, then they'll find that they'll be ahead of the curve and be able to weather the stein storm more easily then others in their industry.