That is how money and influence works. The monied interest gets someone on the committe to insert a paragragh or two into an unrelated bill on their behalf. That is how Enron got to own water rights across South America, for example.

Any bill that has been deemed 'sure to pass' gets immense amounts of pork inserted over time. By the time is is voted on, there are dozens of riders that are unrelated to the purpose of the original bill. The beauty of being in Congress is you can support a bill for its good points, or vote against a bill because too much pork was inserted. Either way, you have a good argument to your constituents.

If you want to use it as a cudgel, feel free. Then find me any member of Congress that hasn't voted on a bill that contains some aspect they didn't campaign on.