Final answer:
The effectiveness of profit-sharing plans can be reduced because their group-based nature may lead to the free-rider problem, where individual productivity is not directly linked to compensation, detracting from their potential to improve productivity.
Step-by-step explanation:
The effectiveness of profit-sharing plans may be diminished due to a variety of reasons. One key factor is that they are often tied to group performance, making the link between individual worker productivity and profit-sharing rewards unclear.
This can lead to a situation where employees who do not contribute as much still receive a share of the profits, a phenomenon known as the free-rider problem. On the other hand, profit-sharing can incentivize employees as they directly benefit from the success of the business, potentially leading to improved productivity.