I think your last point is precisely backwards. Total annual lobbying spending is just $3.7 billion a year, in a $19 trillion economy. It's a tiny amount of money compared to the stakes. If lobbying was so effective companies would spend way more money on it.
It's also notable that you couldn't point to a specific tax law, like OP asked for. Lower taxes in general--nobody needs to lobby for that, there is a large contingent of people who favor that just on principle.
It's also notable that you couldn't point to a specific tax law, like OP asked for. Lower taxes in general--nobody needs to lobby for that, there is a large contingent of people who favor that just on principle.