Well-targeted money can be part of the solution, but if it's your main tool, and you reach for your wallet too quickly, the racket will just raise its prices.

Once legislatures know there is a wealthy, well-organized group that will pay to stop something, they can actually create new proposed legislation simply to shake out a fresh round of 'protect me' contributions from affected interests. In California, these are traditionally called "juice bills":

http://www.doubletongued.org/index.php/citations/juice_bill_...