Most do not outline clear policies to address political donations, political expenditure or the revolving door between politics and business. Neither the law nor stock exchange rules require them to do so, and few do it willingly.

These are some of the key findings of one of the most detailed and extensive analysis of corporate political expenditure in Australia ever conducted.

The Australia Institute commissioned corporate governance and responsible investment solutions provider ISS-ESG1 to assess the corporate expenditure disclosures, policies and oversight of 75 of the 100 largest companies on the Australian stock exchange (ASX).