Final answer:
Frederick Taylor developed the pay principle of incentive pay based on his scientific management theory.
Step-by-step explanation:
Based on his scientific management theory, Frederick Taylor developed the pay principle of incentive pay. Taylor believed that workers would be motivated to increase their productivity if they were given a financial incentive to do so. By implementing an incentive pay system, employees would be rewarded for their performance, which would ultimately benefit both the employer and the employee.