Internal relativity
It can be argued that the value of anything is always relative to something else. This applies to jobs as well as commodities and services in general. Views on job values within organizations are based on perceptions of the worth of one job compared with others. This is the concept of internal equity, which is achieved when people are rewarded appropriately in relation to others according to the value of their contribution. The case for equal pay for work of equal value is based on the imperative to achieve internal equity.