If people want to have 11 children and can bring them up well in a good environment for that many people, then it's not up to you to tell them what they can and can't do. Taxeswise I'm more concerned about the number of lazy sods who are sitting on benefits with no intention of working.
Children who are brought up well, (as the original post implied,) are going to be brought up better than people in families where their parents have just one or two children yet don't care. More is then an even bigger problem. It's these people who need directing.
"The true office of a friend is to side with you when you are wrong; the world will side with you when you are right."
"It is not just a friend's help that helps us, but the knowledge that they will unconditionally do so."