>focus on reducing the professional cost of starting a family //

Few professions are important enough to spare a passing thought over compared to the importance of raising children IMO.

I mean Facebook? Do people working there, for example, really think social data mining for advertising is important in some way? Sure, income is important, but people don't say they want to protect their income, they always talk about career progression (which is conceptually unrelated).

We've got plenty of people, making ways for people to sacrifice everything to a job without failing to reproduce seems pretty counter to any need.