The expectation of rewards may decrease the spontaneous interest in the activity to be rewarded. So it’s important to understand what the rewards should be and how they should be awarded to avoid this side effect.
Rewards should go beyond the usual healthcare and salary raise to provide a good work environment. The ideal is a corporate culture that recognizes good employees with nice perks and words of encouragement, but also provides a setting where people can grow, be heard, take ownership of their work and feel they have a purpose.
The Importance of Incentives - igniting business for the better - Incentive & Motivation