"Research Aims - This study was undertaken to extend existing literature by examining the mediating effect of trust in supervisors in the relationship between perceived interactional fairness in reward systems and organizational commitment. Design/methodology/approach - The SmartPLS method was applied to analyze the survey questionnaire data collected from employees at a national audit department in Malaysia. Research Findings - The results reveal that the effect of perceived interactional fairness in reward systems on organizational commitment is mediated by trust in supervisors. Theoretical Contribution/Originality - This study has proved the effectiveness of perceived interactional fairness as an essential mediating variable in the administration of reward systems. Managerial Implication in the South East Asian context - The findings of this study could help superiors in public organizations to encourage and support their supervisors in implementing good treatment styles for enhancing fairness in making pay decisions and interacting with diverse subordinates. If employees trust their supervisors, it may enhance the effect of employees’ perceived fairness of reward systems on organizational commitment in public organizations in Southeast Asia. Research limitation & implications - This study is limited by its sample, self-report questionnaire scale, and exclusion of several important demographic variables (e.g., gender, age, education, position, and duration of service) in the research model."

Perceived fairness in pay system has two critical features, namely procedural fairness and distributive fairness. Recent studies have shown that the capability of employers to propose and administer pay systems appropriately, including allocating pay and determining the value of pay in a fair manner, has a positive association with employees’ work-related attitude. Although this association has been well-researched, the role of perceived fairness as a vital predicting variable of work-related attitude, particularly towards job satisfaction and organizational commitment, has still not been thoroughly deliberated. Hence, this study fills this gap. Self-report survey questionnaires were collected from the employees of a public audit agency in Peninsular Malaysia. Smart PLS software was utilized to assess the quality of the research instrument and test the research hypotheses. The results of hypothesis testing confirm that perceived procedural fairness and distributive fairness in managing the pay system, are important determinants of job satisfaction and organizational commitment in the examined organization. Additionally, this study offers useful guidelines for practitioners to improve the pay management system and proposes future studies.