 They clashed over industry protection, McMahon's opposition to the establishment of the Australian Industry Development Corporation and his (ultimately vindicated) decision not to devalue the Australian dollar.McEwen accused McMahon of being behind the Basic Industries Group, a pro-free-trade agricultural lobby that funded Western Australian and Victorian Liberals to stand against Country Party members.The governor-general, The Lord Casey, met with McMahon to encourage him to heal relations with McEwen, but there were persistent tensions that the affable Holt found difficult to manage.