I would agree, and I would note that Alberta, which has recently been reviewing their PIPA document, explicitly asked as part of their review process if this should be something that is included within PIPA. We responded that it should.
Political parties are collecting vast amounts of information and subjecting it to the same kinds of data analysis that every other private and public sector body can. They're using it for very specific purposes and getting data from places that individual citizens may not expect them to get it from. All of those things warrant appropriate protection. It could be that PIPEDA is the right place, particularly since the Privacy Commissioner has said he doesn't think it belongs in the Privacy Act.
I would certainly encourage the committee to give some consideration to where you think it should go and to adding it in.