Political Parties and Elections Bill

On indexation, my right hon. Friend has already talked about simplicity, and we are all well aware that most political parties are run almost purely by volunteers. May I put it to him that when he considers what indexation regime to introduce, he should consider indexing only once in the lifetime of each Parliament? Volunteers in particular get a figure in their head and then do not move with the times. I understand that; it is not their job to do so—they are volunteers. We could make the change once each Parliament—perhaps, say, within two months of a general election. That would have the virtue of simplicity, which would assist volunteers.