Despite the tremendous increase and significance of frontline employees in the public sector, little is known about civil servants’ motivation to analyze whether their self-motives may influence their unethical behaviors. The present study aims to explore when and why a person's attitude toward the love of money causes them to violate their own moral foundations and subsequently engage in unethical behaviors. According to three-wave data from 903 civil servants, love of money was positively related to moral disengagement, and moral disengagement was positively linked with unethical behaviors. Further, moral disengagement mediate the relationship between the love of money and unethical behavior. Besides, the study finds that professional stigma intensifies the indirect relationship between the love of money and unethical behaviors.