Wiggins will only ever win the Tour if they include 3 long time trials and a maximum of two summit finishes. As such, he's aiming for the bottom step of the podium which means he doesn't need the entire team dedicated to supporting him, just a couple of riders who can support him in the mountains. Sky can still have five riders in hand to form a lead out train for Cavendish, which is enough.
Wiggins will only ever win the Tour if they include 3 long time trials and a maximum of two summit finishes. As such, he's aiming for the bottom step of the podium which means he doesn't need the entire team dedicated to supporting him, just a couple of riders who can support him in the mountains. Sky can still have five riders in hand to form a lead out train for Cavendish, which is enough.