A simple test has been done several times on the human mentality in exactly this regards. A researcher will go out and select three random people from a crowd. He will then proceed to give each of them money. The first person he will give $1 too, the second one he will give $5 to and the last one he will give $10 to. This is literally money they never had before he gave them the money, however, every time the first two always complained how it was "unfair" that one of them would get $10 and not them. Instead of being thankful that they are all now richer, they saw were envious.
Another fun research I also had to study once was where a group of 20 random people were broken down into 5 groups of 4. A bowl would be placed before them a quarter full of marbles on a flat scale. The researcher at the start would tell the groups "At the end of 1 minute, for each marble you have in your possession, you will be given a dollar bill and the marbles left in the bowls will be doubled. This will be a 3 minute trial." (Special notes: A rule stipulated that "once a marble has been removed from the bowl, it could not be replaced. The groups were close enough to see the other groups but only able to communicate within their own group. An extra 6th group would actually be involved as well but it was a setup group and not formed of random people)
I'll let you figure out what they should do, and what a very rare amount of groups actually do.