As an economist, I think it's preferable that what should be in there are groceries, everything, but you as political experts know that this is not an easy road to follow. Some countries—look at New Zealand and Australia—have in the past decade brought in GSTs of their own with broader bases than Canada, but it is politically tricky and difficult to gain public acceptance for an even more broadly based type of GST.
On March 31st, 2008. See this statement in context.