The key characteristic of the civil service is the merit system. This means that recruitment, promotion, and other employment decisions are made based on qualifications, competence, and performance rather than factors such as ethnicity, religion, or political affiliation. The merit system is intended to ensure that the most qualified and capable individuals are selected for civil service positions, leading to a more efficient and effective public administration. It also promotes professionalism and integrity in the civil service, as civil servants are expected to uphold high ethical standards in their work.