Neither have I. But George Hotz just did the opposite: he explained it to everyone who is not American. Read it. It is short, funny, and devastating.
His version goes like this. Corporations and rich people give money to politicians. Not directly, of course: to their campaigns. The politicians then listen to the people who paid them, and pass the laws those people want. It is not a bribe, because a bribe would be illegal. It is a “Super PAC”. And if a politician was really helpful, he can leave politics and get a comfortable consulting job with the very people who lobbied him.
You just don’t get it cause you aren’t American, lobbying is definitely not bribery.
He is right, except for one detail: as a European, I understand the concept, but I do not use the word “lobbying” to describe it. I use another word: corruption.
