Earlier quoted context omitted.
There are already taxes subsidies for couples and children - that's plenty enough incentive for wealthy families that can support kids. Families that cannot afford to feed or house children should in no way be penalized for refusing to start a family in their present situation.
The reality is the public pensions and healthcare implode without much higher taxes or much higher birth rates. Like the Italian president told his people a few years, if we want things to stay the same, things are going to have to change.
More then this - public pensions are one of the main reasons for low birth rate. You can't have both, if children's role as social insurance passes to public pensions - children became useless.