(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

A worker arrives at his office in the Canary Wharf business district in London, Britain February 26, 2014. REUTERS/Eddie Keogh/File Photo

German Economy Minister Sigmar Gabriel attends a cabinet meeting at the Chancellery in Berlin, Germany August 31, 2016. REUTERS/Stefanie Loos

Billionaire activist-investor Carl Icahn gives an interview on FOX Business Network's Neil Cavuto show in New York February 11, 2014. REUTERS/Brendan McDermid

A view of the Morgan Stanley London headquarters at Canary Wharf financial centre in London, Britain June 24, 2016. REUTERS/Russell Boyce/File Photo

MIAMI, FL - SEPTEMBER 15: Part of the City of Miami's skyline is seen after a Federal jury found that the city defrauded bond investors on September 15, 2016 in Miami, Florida. Yesterday, a federal jury found that the cities former budget director had defrauded bond investors in 2009 by failing to truthfully disclose the city's deteriorating financial condition. (Photo by Joe Raedle/Getty Images)

MIAMI, FL - SEPTEMBER 15: Part of the City of Miami's skyline is seen after a Federal jury found that the city defrauded bond investors on September 15, 2016 in Miami, Florida. Yesterday, a federal jury found that the cities former budget director had defrauded bond investors in 2009 by failing to truthfully disclose the city's deteriorating financial condition. (Photo by Joe Raedle/Getty Images)

MIAMI, FL - SEPTEMBER 15: Part of the City of Miami's skyline is seen after a Federal jury found that the city defrauded bond investors on September 15, 2016 in Miami, Florida. Yesterday, a federal jury found that the cities former budget director had defrauded bond investors in 2009 by failing to truthfully disclose the city's deteriorating financial condition. (Photo by Joe Raedle/Getty Images)