Imagine if Barkhad Said no to his original cut for filming Captain Philips and say he wants 3% of what the movie brings in as Salary
The director just wanted good Somali actors, so he gave the jobs to Barkhad and his friends, and the auditions where taken right next to their residence. If Barkhad ever requested 3%, then they would've took his name off the list and give the role to someone else. He's in no position to request that, he's replaceable.