This article uses the perspective of ordonomics to discuss how the fight against corruption can be advanced through corporations and in corporations. Using an ordonomic approach to economic ethics, the article looks at how companies can contribute to addressing corruption in their business environment collectively. Drawing on an ordonomic approach to business ethics, it looks at the issue of integrity management within the individual business firm. In both cases, the ordonomic perspective shows that compa- nies can contribute to preventing corruption if they learn to change the game through functional commitments. Such institutional reforms in the meta-game, however, become difficult if the mental models and normative notions in the social discourse promote a misguided problem analysis. Using in particular the example of the controversy about whistle-blowing, the article thus shows that complex problems such as the prevention of corruption require a two-tiered approach that addresses both the level of social structural reform as well as the level of semantic reflection and discourse. It argues that constructive social problem solving requires the interplay of institutional reform and ideational learning.