Jeez.

Is there some connection between the lable "ratbag" and the tax? The definition, for those of us who have not had a chance to chase down rats refers to what "rat catchers" used "who carried a 'rat bag'." So is Harry saying that Iain Duncan Smith is a person of multiple personalities, all of whom are rats, or that he represents a bunch of rats? Its hard for foriengers to get the meaning clearly...