Rewards rupture relationships. Rewards can unduly restrict performance. Rewards may undermine responsiveness. Rewards undermine intrinsic motivation. People work for more than money.
Every company has compensation plans.
These plans may vary from company to company. The most common is paying based on an hourly rate. This type of pay is usually based on the type of work to be done or on the amount of skill needed to perform the work. If the job is one that needs a high level of technical skills then the pay will be greater than one that requires very little technical skill. Some companies even have a pay grade that they use to determine an employees pay.