Abstract: | Lean working has had a significant impact on the work skills of civil servants. This study examines the impact of lean specifically focusing on ‘decision‐makers’, those civil servants engaged in deciding tax and social security claims. Using qualitative data from trade union members and stewards in two major government departments, this study found significant evidence of deskilling often in the face of dealing with potentially complex legal and factual issues. Using Mashaw's framework of administrative justice, the article argues that management's use of lean was evidence of an accelerated shift to a managerial model of administering tax and benefits where the administrative processes of decision‐making become paramount at the expense of the quality of the decisions made. |