Campaign finance is certainly broken, but it's not the same as lobbying. Also, most evidence points towards money having little if any impact on elections. Most recently, Bloomberg spent $570 million on primaries and only received 31 delegates.

https://fivethirtyeight.com/features/money-and-elections-a-c...

https://www.vox.com/2016/2/9/10941690/campaign-finance-left

https://www.cbsnews.com/news/bloomberg-delegate-18-million/