Your idea won't work because nobody marries anymore. It's just, hey, let's get a couple of six packs of malt liquor and get nasty together, then if I get pregnant, I'll split the new incoming welfare dollars with you once I'm your baby momma.
My idea: spay and neuter, just like your pets. Cuz the welfare crew is just as dependent upon you as your pet, so why not? People who mate and reproduce like wild animals deserve to be treated as such.