Brands is the Daddy, but Silva will be working with the players daily, so he will have input, I imagine Brands makes such a strong case for HIS targets that I doubt Silva would question his judgement.
I like and get the impression that Brands won't be pushed around when it comes to transfers, and he will just walk away if it comes to it. It's just a shame he wasn't here when Moshiri first came in and spent that massive wedge.