@parados,
Apples and oranges, parados. I think of lobbying as "protection money." Businesses need to send people to D.C. to help inform congress about their businesses, to try to keep them from enacting as many laws that will destroy or screw up their industries. It is bad enough anyway.
http://www.opensecrets.org/lobby/top.php
The above site shows that the Koch Brothers are relatively small in terms of their lobby expenditures. In the first place, they are involved in several industries, each needing some expenditures in that regard. To compare, the mismanaged General Motors that Obama bailed out with our taxpayer money has spent 113 million alone, between 1998 and 2010, more than twice the amount spent by the Koch Brothers for several business interests. Just one organization, AARP, spent close to 200 million, almost 4 times the amount of the Koch Brothers, yet AARP does not industrially produce goods and services like the businesses that the Koch Brothers have interests in.
The above is one reason I will never join AARP. It is nothing more than a liberal organization using unsuspecting old peoples money to further causes that many of those people may not even favor.
I still think Soros is a bigger mover and shaker in politics than the Koch Brothers will ever be.