Meatpackers must list hot dog ingredients plainly on the label, where shoppers can see them.
Politicians get off easier.
They only have to file lists of contributors with the Federal Election Commission. The reason politicians get away with this obfuscation, of course, is that they write the laws. Some in Congress have tried to head off limits on fund-raising by proposing quicker disclosure, perhaps on the Internet. Faster is better than slower, but speed is not the main issue here. Unless voters learn about donors at the same time the politician is asking for their votes, the information does little good.