As bale is currently picked by 43% of teams, would it be logical to not make him captain or the opposite.
e.g. if bale gets like 30 points, on his own, you would think your team did really well, but in the context it's not that great because most other teams have him aswell, so you don't really get an advantage with having bale as captain.
The same could ofcourse apply to drogba and malouda aswell