Propose bills to change the system.
He does this constantly. Unfortunately he is not able to convince his colleagues, who are bought off by corporate lobbyists.
Influence others to vote against bills that spend money on things not authorized in the Constitution.
Paul is constantly imploring his fellow representatives to stop the madness. You can see dozens of his speeches on Youtube, if you would care to.
Unfortunately, when someone is receiving millions from, for example, a Pharmaceutical lobbyist, it makes it very hard to convince that person to vote against the power of the FDA, whose boards are ran by Pharmaceutical lobbyists.
Instead he has a "if you can't beat them, join them" attitude.
No, he has a "well, if your going to spend it, I'm not letting you take MY districts money!" attitude. He has an obligation, as the representative of his district to defend the as best as possible.
How is he different that any other politician?
Because he is not completely sold out to corporate lobbyists? He has the best interests of the people in mind? He doesn't use his position to line his pocket, and increase his own political clout? Just pick one.
Again, this thread is about that two bit, lying, establishment robot Mit Romney. There are dozens of threads about Paul. Take it to one of those, please.