Departments overestimated security personnel needs and availability; overestimated their operational resources needs and costs; planed for high contingencies and budgeted for worst-case scenarios, the auditor general said.
The auditor general was primarily concerned, however, by the fact that Parliament, which was responsible for approving the money, was not given an adequate picture of what the summits would cost taxpayers.
MPs were asked to approve seven separate funding requests from 14 departments at four different times.
"The way the information was presented made it very difficult for parliamentarians to know the total amount of funding being requested for G8-G20 summits," the auditor general's report said.
And even though government officials knew at some points that they were asking MPs for money they didn't need, they still pressed ahead.
"We found that by the time (a second funding request was) tabled in Parliament, government officials had already determined that due to changes in plans, the majority of the funds approved for security ($179 million) would not be required for the 2009-2010 fiscal year," the report states.

The audit report found there was a "lack of overall assessment" and government departments overestimated how much the G8 Summit in Hunstville and the G20 Summit in Toronto in June of 2010 would cost |