First off, let's set things straight, he won a lot of money, did he win it because of his friends? Did they win it through the power of friendship or whatever the fuck? I don't think so. From that alone you would understand that the winner is in no way liable to give anything to his friends, he's not indebted to them monetarily or whatever, and if he would be generous to give his friends something back, it's all from good will and not because he owes his friends something. You people act like people owe you for your existence or presence when everything's just a matter of circumstance. Everyone who's saying the winner's on the wrong here should get off their high horses cause most likely, if you were in his shoes you'd probably do something even worse lol.
Selfishness isn't wrong imo, especially in this dog shit economy. I'd avoid all matters of money-related issues as well if possible and just save up as much as I can if I could.