As a result, many people of pension age are barely able to meet their needs unless they continue to work. In essence, it concerns the movement of individuals or groups of people in sodal position, such as income classes, employment status or career structure, and measures the real extent to which equality exists in a sodety. Sodal mobility can be upward or downward and either intra-generational (occurring within a generation) or inter-generational (occurring between generations). "