Why might the use of incentives in the form of gift certificates be better than just providing cash to employees?

This case discusses incentive plans that stimulate employee interest and motivate them to perform well. (For the case, go to www.cengage.com/management/mathis or visit the instructor companion website.)

1. Why might the use of incentives in the form of gift certificates be better than just providing cash to employees?

2. What are some advantages and disadvantages of a sales incentive program in which the top performers receive a trip or other large reward, while other sales individuals receive lesser or different types of rewards?