If you're doing such a comparison, then it points towards a salary system that's working as it should, but a disbalance in gender roles in childcare - which can be fixed not by changes to salaries, but by changes in childcare policies such as those successfully implemented by Sweden and others, where male nurses in similar situation as your wife would take time off comparable to female nurses. They'd still be behind childless workers, though.
That's how it works, if your family is more valuable to you than your career, then you'd be happy with getting more family at the tradeoff of less career - and that explains why the positions at the very top get a disproportionally large number of divorces/etc - if someone is consistently neglecting family because of their career, then they do get to the top easier than someone who'd sometimes actually prefer going home to their kids.
That's how it works, if your family is more valuable to you than your career, then you'd be happy with getting more family at the tradeoff of less career - and that explains why the positions at the very top get a disproportionally large number of divorces/etc - if someone is consistently neglecting family because of their career, then they do get to the top easier than someone who'd sometimes actually prefer going home to their kids.