A family which stays together for selfish reasons and not out of love does not stay together for long. When the family is humoured for convenience and necessity, its utility gets over soon. In such cases, children don’t need their parents when they grow up. A wife does not need her husband if she earns her livelihood. A husband may be attracted to a younger and more beautiful woman to fill his life. Parents do not want to waste time and money in bringing up their children who may leave them on growing up and won’t be available in time of need. An investment in a bank would perhaps be more reliable for old age than investment on children.