Who Would Simply Help For No Payback?

"Wai could never understand what the Peace Corps was all about. It went against everything he had learned about life;there was something preposterous, something dangerous, about a rich white man living in his town and talking about working with him, helping him make more money—for nothing. He knew that there were strings attached, that he would end up compromised, his integrity flawed. No, no, no. No thanks.......
Later in  that same month Wai  came to my house on a Saturday night. He had been drinking a little, which was about the only way he could ever talk to me easily. He began to thank me for the rice, but he choked up, stopped talking, and suddenly burst into tears. When he could speak again, he told me that I was the only one in town who had helped him and that I was his friend forever. For a dollar's worth of rice and beans, I figured it was the biggest bargain of my life. He told me that he had talked everything over with his wife and his mother, and they had decided that there would be no danger in working with me. "The truth is," Wai said, "you were like a god out of heaven to us." Since I was already secretly convinced that Wai was some primitive deity, it turned into a real confrontation of the gods.
(Moritz Thomsen. Living Poor. Pg 128, 129)