Have you ever received a reward (cash or otherwise) fo doing a good deed? Not talking about prizes here, just rewards. Have you ever offered a reward for something?
I lost my phone on saturday night. I spent sunday morning in denial ripping my house to shreds to find it and then, when all hope was lost, sent a text to it saying there would be a £50 reward for it's safe return. Two minutes later I got a phonecall back. People just don't do things out of human kindness anymore. That said, i never paid out the reward.