Pay includes benefits such as vacation and sick days.
It illegal for employers with 15 or more employees to discriminate with regard to wages on the basis of race, religion, national origin, disability and age. Skill is measured by factors such as the experience, ability, education and training required to perform the job. The key issue is what skills the job requires, not what skills the individual employees may have. A waitress with a master's degree is not entitled to more pay than a waitress without a master's degree. Effort refers to the amount of physical or mental exertion needed to perform the job.