I'm not a parent. Why is the state punishing my choices? </sarcasm> Economic efficiency seems like a decent motive for state policy. From the state's perspective, why pay an unlicensed untrained parent to stay at home minding 1/2/3 children, when the state could pay a licensed professional to mind 6/7/8 children (freeing up 3/4/5 parents to contribute to today's economy)? To my mind, full time parenting is a luxury. If you want it, and you can afford it great, but the state shouldn't be subsidising it.