I'm gonna vote for mandatory vasectomies for all men over 25. I'll be a lot nicer to them and allow their employer to provide access to health insurance that covers the cost of the mandatory contraception.
Unlike dogs, they'd be allowed to keep their dangling bits.
It'd be a small one-time cost and then no one will have to be bothered with any future birth control expenses. Of course, that would mean any woman wishing to have a child would need to have sex with a youngun under 25 (or obtain sperm from one) to do so....