Wouldn't that create more a equal playing field where all kids are raised using the same methods? Social economic differences between families would be elimated through this model.
Men/women would not have to raise children. They would have more time to work and more money/time to spend on themselves. This would create a more level playing field allowing women to stay in the workforce allowing for more wage equalization levels between the sexes.
One could say parenting is the greatest public health matter.