There are two ways in which The Wild Geese is essentially about victimhood. First there is the social aspect of victimhood presented by the station of the lower class. The wealthy character, Suezo, has made his fortune by deceiving people and by scandalous money-lending practices. This represents the basic dilemma of social injustice, or social imbalance, when the rich are too rich and the poor are too poor. Then there is the victimhood of arrogant men against family and honor. This is the more dramatic picture offered in the narrative.
A great place to start when analyzing Suezo's character is to understand Otama's father's point of view as a man in the relevant society. When he sees Suezo, he sees a cruel, sociopathic man of dishonorable character. That's an indication of just how shame-worthy Suezo is to his own community.
That makes Otama's sacrifice even more tragic and powerful; she has become the sex slave of a traitor and a criminal, all in an effort to make sure her father is comfortable. In a tragic irony, the father doesn't even enjoy his luxury, and he really just wants things to be the way they were when he had his wife, and when he could spend time with his daughter.
The dilemma is also a fairly straightforward archetypal judgment of a father-in-law who knows how dishonorably his daughter is being treated. The story bears serious resemblances to the biblical story of Esther.
