You have been proactive as a committee. The study of ministerial responsibility done last year was largely independent of the Auditor General's report. It was done primarily as a result of dissatisfaction in the committee with what it had found in its investigation into the sponsorship program. So there's nothing preventing the committee from doing that.
I will leave the aquatic centre aside because I know too little about it. But office space is an issue on which you have a report by the Auditor General. You have had a preliminary look at it. My view is that you should make a report as a committee saying you are not satisfied with the government's way of controlling office space costs, and then ask the Treasury Board and the Department of Public Works, or whoever, to respond.
You are perfectly entitled to carry on from that over the years and, if you're not satisfied with the government's response, produce another report, as I understand the committee has done with the report on ministerial responsibility and accountability. I think you're already on the route you're suggesting.