If there is one player worth bending (or even breaking) our wage structure for it is Roberts.
It would be crazy for him to stay here if we remain in NLN but if we did stagger through the play offs who knows. Personally I think now he has proved his long term fitness a few EFL clubs will be making him offers but currently no League 1 or 2 clubs in his neck of the woods unless York win the National League playoffs.
You can’t set up a sensible wage structure in the aim of sustainability and then just go and break it for one player. All the others would be rather miffed.