Even if they aren't written by Lobbyists I'd be surprised if most bills weren't influenced at least a little by at least one lobbyist group.

Hmm, probably depends on what you define as a lobbyist. If you're writing a bill about education reform and including more tech in the classroom (just a hypothetical example) and ask the teacher's union, Brookings, and a major education company about what would be important to include or not include, would that be influenced by a lobbyist group?