The Commissioner for Standards in Public Life insisted on Monday that his role is to bring about change and he did not entertain any arguments by people under investigation that they were only doing what had been done for years.
Speaking before the House Business Committee, George Hyzler also defended his appointment as a former politician, saying that decision had clearly been taken because the holder of the post needed to understand how politics and politicians worked.
Hyzler served as a Nationalist Party MP between 1995 and 2003.
Labour MP Glen Bedingfield last month repeatedly insisted that the appointment of a former politician undermined the credibility of the office, which he accused of being partisan in its actions.