> If so, why do you think lobbying exists?

Specifically because it's not a natural market. There are people who secure a 2-year, consequence-free term to impact U.S. law, at the behest of people with money.

Lobbying is special interests dictating decisions that often are not financially, morally, or otherwise ideal/beneficial to the other party (the United States and its people). This wouldn't fly at any corporation or business because there would be direct impacts on the bottom line or reputation of the company.