Is this really the Wilpon's decision?
I know most like to blame them for everything, but IMO, this is Alderson's decision. He, or his VPs, are the ones who negotiate contracts; Dickey is already signed for 2013, so it doesn't affect the budget; even if Dickey is extended for 2 yrs at 12 mil, it only adds 7 mil to the future payroll. With Santana and Bay (mostly) off the books in 2014, the 2 yr extension is not excessive and well within what will be Alderson's 2014 & 2015 budgets. I don't know why this would need much more than a Wilpon's rubber stamp.
IMO, Alderson is looking to either sign Dickey to a Mets-friendly, below market deal or trade him. I think what's happening with Dickey is much more reflective of Alderson than the owners.
Also, Alderson and Jeff W. have both said publicly that Alderson has some money to spend. If true and there's no better uses, Alderson can use some of that money to give Dickey a raise in 2013 and lower what the Mets will pay him in 2014 and 2015.