Because lets be realistic - a world gov would be run by the same guys who have alot of power in the UNO. Do you believe the USA, Russia, China and so on will say" fuck it, we are going to let [insert small country] have the exact same power as we do"?Why do you assume a world government will basically be USA? What makes you think that Indian majority themselves don't want more rights for women? And why do sanctions make more sense than putting corrupt politicians who abused universal human rights to trial?
I think if the majority indians would want that, they would have another gov right now. Given I do not kbow much about their political system, but it certainly isn't looking like a "majority" of people want to change things.