(FILES) This file photo taken on September 27, 2015 shows people walking outside the Palais Garnier opera house during the "Car-Free Day" event in Paris as part of the French capital's lead-up to hosting the COP21 international climate conference in December. France's state auditors have rebuked heads of the Paris Opera Ballet for their taxi bills and for providing star choregrapher Benjamin Millepied with a car and chauffeur. They criticised around 10 directors who had worked up taxi bills of nearly 100,000 euros between them in 2013 and 2014, and also took aim at the "quite high level" of spending on business lunches. / AFP PHOTO / BERTRAND GUAYBERTRAND GUAY/AFP/Getty Images