When 'Long Legs' came back from the bathroom, Joe Ga chatted with him again and then prepared a gun and some cash for him, telling him to follow the supply truck back to Baghdad that day. From there, he was to board the cargo plane that had brought 'Avenger' and head to Tubruq to report to Thompson.
Joe Ga did not trust 'Long Legs'; rather, the guy simply had no choice.
He had been so desperate that he applied for a job at P.B. to avoid Thompson's collection efforts. Even if he were let go, he had nowhere to hide.
Joe Ga even felt that after 'Long Legs' gave up resisting, he seemed much more relaxed, as if a thousand-pound weight had been lifted off his shoulders.
In order to save little Jack Heinz's life, he sent part of the 'stain list' saved by the 'Accountant' to Thompson.
In return, P.B. needed to release 'Smoker' and 'Syringe,' who were being kept as laborers in Sangha Town, and provide Jack with some necessary support so he could survive the return.