Stop being concerned for those muslims, let husband and wife deal it, its their private matter how many children they want.
reminds me of this quote from gladiator movie.
Juba: What do you say to them?
Maximus: To my son - I tell him I will see him again soon. To keep his heels down while riding his horse. To my wife... that is not your business.
If that is the case then there is no problem..but it not always the issue.The parents cannot take care of the kids and then it becomes a problem of the society.
We see plenty of the same here...there is even a word for it..."welfare queens".