In my mind I see this as a social health crisis. The elderly provide an unbelievable amount of wisdom to the next generation. By abandoning them, we abandon our children's future. I think of the elderly as an essential vitamin for children. They impart valuable social memes and at the same time tell the children, by there mere existence in their lives, that we value our family and when the children's time comes to age and pass away, they can expect to be valued as well.
In other words, by abandoning our elderly, we're sending a clear message to our children that human life has no inherent value if you can't produce. No wonder children in industrialized nations can't seem to feel a sense of belonging.