Joe Ga particularly likes dealing with seasoned characters like Aljin because many things don't need to be explained too clearly; they already know what to do.
But if it were someone impulsive like Raphael, he might not realize until halfway through that reality differs from his imagination, at which point Joe Ga would have to exert effort explaining.
Aljin doesn't need that. When Joe Ga told him about his charitable action plan, the old guy instantly grasped the key points.
P·B does charity work internationally under the United Nations banner, but because the P·B team acts relatively aggressively, they've never invited United Nations personnel to participate in actions to avoid some embarrassing situations.
Now Joe Ga suddenly changed his habit, and the only possibility is that he wants the United Nations to shield him from some malicious scrutiny.