//According to NJ (and others), anything that goes wrong with the country’s economy is nothing to do with the government,...//
That's not the case at all. There are many faults with the UK economy over which the government has control. For example, using taxpayers' money to pay people to sit at home eating Hobnobs whilst there are hundreds of thousands of job vacancies; using that same money to pay part of the paybill of companies who will not pay the going rate for the work; depressing interest rates so that house prices soar to unaffordable levels (yes, I know the BoE's "independent" MPC sets interest rates but they are about as independent as a Labour councillor on Liverpool City Council).
But one thing the government is not responsible for is running haulage companies. Hauliers have presided over the steady decline of HGV drivers' pay and the beginning of that decline long pre-dates Brexit. They are now wailing that they cannot provide their services without imported labour. Well they've had five years to get used to the idea that they can no longer rely on it and five years to make the job more attractive by paying decent wages and not expecting many of their staff to kip in a lorry cab for four or five nights a week. None of that has anything to do with the government.