I tend to agree, I don't live in America but I think spaying/neutering is a worldwide issue that all animal lovers need to address.
In our area here in London [UK] we get so many dumped cats it's unbelievable...
There's no excuse over here either, people on welfare/benefits are entitled to free vet care! Some people are just plain negligent. I wish we had animal cops like they do in Miami (haha, got to love Discovery Animal Planet!)
I think all governments should provide incentives to spay/neuter though, so then people can stop using money as an excuse not to neuter their pets.
That's just my [probably irrelevant] thoughts.