There are only so many transplants; people die daily waiting for them because there are not enough; only the healthiest and most likely to benefit get them, there is a whole set of criteria as to one's place on a list. It has nothing to do with being mentally ill or physically ill or and individual's "deserving" them, it has to do with not wasting the transplant!
Read the
current facts about transplantation instead of somebody's personal ideas and opinion about how it works and whether it is equitable:
http://www.unos.org/donation/index.php?topic=optn