Gender inequality runs through society, even to the point of placing undue burdens on women in the prison system. Why was a basic human function not adequately supplied for? Why were women forced to pay extra for things they needed just as an act of living? Because anything that does not fit a man's narrow experience is considered "excess" and therefore shouldn't be a "burden" on men (budgets, awareness, learning, sharing society, etc). This is how we end up with headlines like this, where providing a basic product like a tampon is considered an innovation in policies for women.