Mazars is likely wondering if they are going to be the next Arthur Andersen before this is all over. Good luck finding another firm when one of the top firms in the world drops you like a hot potato.
Arthur Anderson knowingly fudged the numbers at Enron, and provided both accounting and consulting services, which was a big conflict of interest. The consulting arm came up with new type of revenue opportunities (energy contracts), and the accounting arm cooked the books to show that these were profitable.
The associated debt was in the subsidiary, and thus didn't show up on the balance sheet.
Arthur Andersen messed up big time, not in the least because their Chinese walls failed in every way imaginable but the parallel is pretty close: all of these companies are chasing new markets with abandon when in fact they should out of caution rather than regulatory pressure slow down and do their jobs properly because the financial world depends to a very large extent on that.