To begin, it is thought that individuals should be accepted to maintain working regardless of their age because it contributes to the increase of workforces in societies as well as decrease the burden of finance for retired organizations. For example, in developed countries, such as The US labour is a big trouble and they must hire employees from developing countries and underdeveloped countries, like, Vietnam, Thailand, Lao and much more. Therefore, the regulation of retirement is 67 years old in America partly helps to solve the shortage of workforce issue. This regulation also helps to shorten the time of retirement, which means the payment for retirement also will drop.