Final answer:
To increase job satisfaction among subordinates, a manager's first step should be to enhance communication, as research suggests it significantly impacts job satisfaction more than factors such as financial rewards.
Step-by-step explanation:
Research indicates that the first thing a manager should do to increase subordinate's job satisfaction is to enhance communication. This ties into the concept that the work-content factor, which includes job variety, level of challenge, and role clarity, is strongly predictive of overall job satisfaction. While financial rewards such as pay and benefits are often considered, they only show a weak correlation with job satisfaction. Managers who focus on providing clear communication, appropriate challenges, and recognition can foster a more satisfying and productive work environment.