I say that when your money for your care runs out and you have no kids or family or church to turn to for your care when you get old and sick, we take you to the Trail's End Euthanasia Center. Selfishness should not be rewarded.
I actually have no problem with the state not subsidizing anyone in their old age. Take care of yourself, whether you have children or not.
Anyway, a person who has not had to spend hundreds of thousands of dollars raising kids will probably be in a pretty good position to take care of themselves when they get older.
Do you think everyone should have children, regardless of their ability to raise them?