What does Man's Children symbolize in A Christmas Carol?

The boy, ignorance, represents the poor, uneducated working-class factory children in England at that time. The girl, Want, represents poor children who didn't have common necessities. In this scene Charles Dickens is saying that England needed to educate and care for it's children, or else it was doomed to collapse. That is why the Ghost of Christmas Present says that the children are mans.