Madhu is an emergency room nurse who was hired by the hospital two years ago. During her first year of employment, she did an exceptional job. Satisfied patients wrote letters commenting on her excellent care for them and their family members. Her colleagues knew she was a qualified nurse who did her job quietly and competently. Her supervisor noted that she was always willing to come in to work as needed and stated in Madhu's first annual review that she was "an excellent nurse who could be counted on." As a result, Madhu received a significant increase in salary at the end of her first year. She currently earns Rs. 4,00,000. Other nurses in the department earn about Rs. 3,00,000. Everyone had expected Madhu to continue to excel. Unfortunately, Madhu's performance declined after her pay increase, and her work performance is now about average. Are there any ethical issues presented in the scenario? If so, what are they? As Madhu's supervisor, what should you do?