Do you really think a fancy dinner and a golf outing to scotland is enough to sway someone's vote in congress? Sure, maybe some one who doesn't care either way about something could be so easily swayed, but members of Congress? And they are supposed to care about every vote, its why they ran for office, isn't it. I don't know how any one so spineless as to be so easily swayed would be an effective campaigner. Giving tens of thousands of dollers to Al Gore, George Bush, and their respective parties hasn't helped Ken Ley and the other executives at Enron a tiny bit.
As the saying goes, "A politian is the worst friend you'll ever buy." Because they turn on you as soon as the publics' mood hints at being against you, no matter what you have done for them or their friends or family.