Without a doubt, lobbyists are hurting America more than they're helping it. Lobbyists are designed to go after their own interests and disregard everyone else's. Therefore, these entities and individuals should be taken out of the American political system. Doing so would bring many benefits to the country as a whole.
Lobbyists are only interested in what they are pushing and usually have enough money to back their cause with whatever they support. They can just throw money at a problem and politicians will back them because they need the money to get re-elected. This is why that lobbyists are able to ruin America by taking away some of the democracy and freedom that every individual is given.