You have no control....it is a policy by your broker. but I suppose everything is negotiable...but this is a hard one to negotiate as it is not commission related and many will tell you they are simply passing along a cost that their bank charges, whether it is true or not.
However, Washington Mutual will let you SEND wires free...
In the days of ACH...this simply amazes me...Wires shall become obselete, but the system is still used according to WAMU.
Foreign countries and transfers will be the last to join the Global banking revolution...