The need for an equitable salary is just as legitimate as the need to care for children. I have a family to care for even if they are not listed as dependencies. I also have a future family to prepare for that I might want to get a leg up on. Or maybe I want to forego children because I'd rather save up to start something more meaningful to me later.

Just because you have an immediate need that is evidenced by children doesn't mean others don't have equally legitimate needs.