The global boss of Fiat Chrysler Automobiles, Sergio Marchionne, has hit out at the "distasteful" management regime of former Australian executives Clyde Campbell and Veronica Johns, and has vowed to pursue "all remedies available" to try and recoup tens of millions of dollars from the pair. In an exclusive interview with Fairfax Media in Geneva, Mr Marchionne spoke for the first time about the scandal that has rocked the company .