sad truth is it is good that people die.
what do you think would happen if idiots can live forever or for a really long time (several lifespans of a normal human).
the most likely scenario is that the rich will get it first, then the smart and the rest won't.
very unrealistic that the society from today will just start to be altruistic.
You just described this movie:
http://www.imdb.com/title/tt1637688/Lol he did indeed, great movie by the way. We will find solutions for the overpopulation wich is not that worse as many people think, soon we will be on the moon drinking coffee