But I'm convinced it would not have the good effect you anticipate. It would be more of the same: triflin' men who are no more, spiritually and emotionally, than ill-raised early adolescents: doing porn, jerking off, scoring when they can; women who want babies going to the bargain-begettin'-basement at the Clinic for the requisite sperm inject.
Not the human world we were hoping for.
Vasectomy has been around for decades, surgery is clearly not appealing to single men, the pill is.
The female sex is not programmed to give sex for nothing, once they know that men are bulletproof and untouchable from any legal issues or consequences, then they will want to figure out some way to end that totally one way street.
My guess, is that they will go back to the timeless patterns of history.