He vauled them because they're his friends to help keep a calm environment especially with the last 5 GTs he won always had riders on his own team trying to beat him and working for themselves. Specifically LL, LA, and Vino.
Again Porte himself stated he did absolutely nothing to help Contador in the GTs since he simply couldn't. He wasn't there as a rider until Sky. The same 7th were he got 13 minutes from a breakaway?
Froome has a better team largely because Sky has lots of money not because of his leadership.
So what you're saying is that Contador was such a poor leader that anyone who fancied their chances rode against him so he had to bring in some friends. But the only friends he had were inadequate riders.
Leadership is part of the job of being a leader. It seems Contador was rubbish at it.