We need a constant stream of younger folks to maintain our way of life. Workers who keep the world moving along and paying in to support the older folks who can't work anymore. The US is already in a bit of trouble with this need. In a couple decades, we won't have enough 30 year olds to run the consumer economy we enjoy now. Right at the wrong time for middle agers who will be retiring then. Who is going to change my 75 year old diaper?