The UK’s suffering a labour shortage. There are four causes. a) Covid deaths b) Long Covid c) People not working because of no Covid restrictions d) Brexit. We can’t do much about (a) and (b) but we can protect older workers from Covid and we can reverse Brexit. Problem solved.
A shortage of labour is what pushes up the workers’ wages. So, by reversing Brexit Spud wants to increase the labour supply and thereby not raise the worker’s wages. Just odd thing to be arguing for really.