While I have no idea if this is true or not, I hope it is incorrect. Most people have speculated that the Patriots would be asking Wilfork to extend his contract to save the team some cap space this year. Assuming that the Patriots were just trying to move some money from the 2014 season to later seasons and not just cutting his salary outright, I think Vince is being selfish.
While Vince may be irreplaceable, the defense will be able to survive without him. Although the defense did have drop without him in the lineup, they were also missing our other big man Tommy Kelly for most of the season.