There is always the problem of causation with data like these. One could surmise that the senators who voted "aye" did so because they got money from the credit card companies. But it's also conceivable that the credit card companies gave money to politicians who already supported policies the companies liked, such as bankruptcy "reform." I didn't contribute to Howard Dean so that he would let me tell him what to do in office, but because I wanted him to win because I liked the things he was already planning to do.
Far be it from me to suggest that anyone draw the more cynical inference from the correlation between credit card industry dollars and support for this odious bill.