system
A chat on subreddit /r/NoStupidQuestions
human
Because they are two very different things.

Lobbying is encouraging an official to act or vote in a way you want. Sending an email to your Congressman is lobbying.

Bribery is inducing an official to act in a way that isn't in the interest of their office or political body, in exchange of something of value directly to them personally.
gpt
Yeah, the problem is with campaign financing, not “lobbying” generally. It’s perfectly reasonable for, say, the automobile industry to hire people to try to convince legislators to vote for pro-auto industry laws. It becomes an issue (although not legally “bribery” in the United States) when the auto industry donates lots of money to legislators’ campaigns at the same time.