NDP Ethics Critic Charlie Angus has criticized John Duncan and other Conservative MPs for charging "frivolous expenses to Canadian taxpayers," as stated in a news release.He takes particular exception to limousine costs.“They’re cutting border services, they’re cutting food inspections, they’re short-changing seniors — but cabinet ministers aren’t cutting back on limousines,” Angus said in question period last week in Ottawa.He chastised the the North Island MP/Aboriginal Affairs Minister and other several other cabinet ministers for charging taxpayers $22,302.16 in overtime limo spending, according to documents uncovered by CTV.“How do the Conservatives have the nerve to tell Canadians that the cupboard is bare while ministers on the front benches are stuffing themselves on perks and entitlements?” Angus said.Angus claims Duncan had his limousine driver working overtime from Aug. 6, 2010 to March 31, 2011, sitting on standby an average of 25 extra hours per week. He equates the overtime costs to the list price of a brand new Toyota Prius. Duncan was not available for comment. "We are always looking for ways to run the government at a reasonable cost to taxpayers, and this is an area that we are looking at," said Jan O'Driscoll, a spokesman for Duncan. "However, salaries and overtime from drivers employed by the public service are based on collective agreements with unions. Ministers work long hours and drivers frequently have to work the hours that a minister is working."