"The fact that they're a congressionally chartered group should no more incline people to give to that group than the fact that it's National Pickle Month should make them eat more pickles"

This quote by Barney Frank is a humorous way of stating that people must not be influenced by the reality that a group is congressionally chartered when choosing whether or not to contribute to it. He is recommending that just as National Pickle Month must not make people eat more pickles, the fact that a group is congressionally chartered need to not make individuals provide to it. He is highlighting that people need to make their own decisions about contributing to a group, and not be swayed by external elements such as the group's charter. He is likewise suggesting that people must not be affected by approximate things such as National Pickle Month. Ultimately, Barney Frank is promoting for people to make their own choices and not be influenced by external elements.