Adoption and Parenting
Yes, I sometimes think about the fact that not having children with result in not having a younger generation beneath me to support me ... and that is why I have spent most of my working life so far being frugal so I can make my investments and provide for my old age. I either have the set of genes that took my grandmothers well over 80, or I have the genes that took my grandfathers, both of heart attacks, in their forties ... or I have a mix and will croak just as I get ready to retire and enjoy the fruits of my labours
Naturally! That goes without saying The young will hopefully still have something left in Social Security when they grow old, and as for private investments, the young gets compensated for their work so that they can make their own investments. It is a sort of synergy. Parasites of any kind would jam up the works. ( and they do exist and do jam. One can but hope for more synergists than parasites )