If you start with high-quality raw materials, you're more likely to get a good product. Nobody's perfect, of course. But without good legislators to begin with, the odds of getting good laws are extremely remote. Like they say, "garbage in, garbage out."
Forget about trying to turn bad legislators into good ones. Even if you talk until you're blue in the face, it won't make one bit of difference. That's because a leopard won't change his spots any sooner than a nanny-crat will respect your rights. It's possible ... but highly unlikely. Better to start with someone who's got a good reason to listen to you.
Once you help a candidate win their first race, you have a friend for life. After all, you are the reason they got elected in the first place. And that's why they will listen to you -- especially when there's important legislation being considered -- because you earned their trust on the campaign trail.
So if you want good legislation to come out of the state capitol, make sure you put good legislators in there to begin with. Then you'll be happy with the laws coming out of the legislative assembly line, because they're made from the best stuff on earth: good legislators.