But tell me, if both parents are out working, full time, and there is no grandparent around, who brings up the children?

And if there is only one parent around for whatever reason, and there is no grandparent around, who earns the money?

Or is the state (the nanny state you constantly denigrate) supposed to provide the money for food, rent, clothing whilst the lone parent stays at home looking after the children?

Parents do split up, people fall in love with other people, families break up etc. What happens then?