Gender pay inequality doesn't exist when looking at the same job opportunities. The issue is more about the different career choices people make. As it stands at the moment, women are statistically more likely to apply for slightly lower paying jobs than men. There are different causes for this.
The status quo doesn't need to be micromanaged. Children deserve the most contact possible, and it is easy to overburden businesses. Laws and regulations are expensive, even the ones designed to create revenue theoretically divert opportunity from elsewhere.
Countries where there are women quotas do not show any problems when it comes to family planning. It simply just shifts to more men choosing to be stay at home dads. It is not a good argument to say that children need the attention of their mum, because they wouldn't lose it in the first place.