I am in my sixties and I still think that younger people should be the ones to get the kidneys for transplants when one is needed. There is generally so much more life to be lived by a younger person. Perhaps the presence of dependents should be taken into account, too.
Let's be frank. Modern medicine is a big business. The younger the organ transplant recipient, the better the possible return on the investment will be. Plus, younger patients will have a chance to live out fuller lives that many of us have already had. A five-year-old should be given precedence over a 30-year-old simply because the younger patient hasn't fallen in love, had kids, or even lost a tooth yet. Let younger patients experience more of life!