"The train pays me in room and board, and in points, and in missions to keep me useful." The concept of actual payment is foreign to them. Soldat is more of the experience that they serve others, they make themselves useful, and they're very, very lucky if they're rewarded for it rather than punished. Without usefulness, without people to protect and look after, what point is there to a not-person's life, after all?

They are, however, greedy for affection and human connection, and also their headphones aren't exactly comfortable for long-term wearing. So: "But I won't turn down better headphones, if you want to improve them."