"Corporations don't lobby Congress for fun. They lobby because it helps their bottom line. Getting a regulation gutted or a tax loophole created means extra cash for the corporation. But getting laws changed can be very expensive. How much money does a corporation get back from investing in a good lobbyist?
It's a messy, secretive system so it was always hard to study. But in 2004, economists found a bill so simple, so lucrative, that they could finally track the return on lobbying investment.
The American Jobs Creation Act benefited hundreds of multinational corporations with a huge, one-time tax break. Without the law, companies that brought profits earned abroad back to the U.S. had to pay a tax rate of 35 percent. With the law, that rate dropped to just over 5 percent. It saved those companies billions of dollars.
In a recent study, researchers Raquel Alexander and Susan Scholz calculated the total amount the corporations saved from the lower tax rate. They compared the taxes saved to the amount the firms spent lobbying for the law. Their research showed the return on lobbying for those multinational corporations was 22,000 percent. That means for every dollar spent on lobbying, the companies got $220 in tax benefits..."