"It's not about money. It's about what's fair."
"What does that mean?"
Something doesn't click there for him. Going back a year to his playthrough of DR3, he was at the end of the first trial where Kaede's about to get executed, and she's explaining that she didn't take the first blood perk to save herself because she wanted to save all of them by ending the game before it even started. And he's sitting there, confused, not understanding it at all while he makes crude remarks and his usual animal noises. It just makes me think that he's never truly had a friend in his whole life and things like gratitude, altruism and the idea that friends (as well as people in general) exist for a purpose other than to serve him are alien to him.