How about adding that the State Education only pays for one kid - and the parents foot the education bill for the rest of the kids.
Will that help "curb" the choice?
Doubtful, rick. And what sense does it make to punish the child for the perceived sins of the parent(s)? Once the child is born it is by far and away in the best interests of society as a whole to see to it that the child is well-fed, healthy, and well-educated.
Part of that education, I would suggest, should include health education and sex education, so that a larger proportion of those children will grow up understanding the values of a healthy lifestyle and less progeny. That, IMHO, is the best way to reduce the overuse of resources.