I get fed up with ridiculous straw-man arguments like this. Clearly in saying "get on with it" it means "find a solution".
I acknowledged the DVLA is caught in a difficult place. Can't you show a degree of balance in your response? There is (according to some) a food shortage due to a lack of HGV drivers, and there is a massive backlog which does interrupt peoples lives a great deal. As mentioned, my disabled father is currently off the road awaiting clearance from the DVLA.
Also, everything you mention applies to pretty much every public sector job going, so the fact it's only affecting the DVLA shows that it is facing particular issues, but also that those issues may not be entirely related to the topics you raise.
So I repeat, with greater clarity...Get on with it (and find a solution)