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it shouldn't be illegal  because when they get old, they will have weaker health, in addition to that they will also reduce their memory. All these factors will lead to reduced product quality. Many jobs should be left to young people because they are healthier. Instead of going to work, they should stay at home and enjoy old age with their family so they can take care of them.

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In fact, without a mandatory retirement age, employers are suddenly obliged to continue paying into people’s pensions much longer than they expected to, and to put up with other significant increases in costs such as higher insurance premiums, more expensive healthcare benefit plans, and so on. Beside that firms may find it hard to recruit, motivate and retain younger workers. Firms may also find that with no retirement age they have no idea when people will leave, creating problems of uncertainty in manpower planning

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Age discrimination is illegal at any stage of employment, including during hiring, promotions, raises and layoffs. The law also prohibits workplace harassment, by coworkers, supervisors or clients, because of age. The ADEA applies to employers that have at least 20 employees; some states have stronger protections. Also prohibited: mandatory retirement ages except for a few exemptions, such as airline pilots and public safety workers.

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Having few older workers also increases the amount the government needs to spend on unemployment and other benefits, and decreases tax revenues. This strain on public resources is increasingly critical in many developed countries given their ageing populations, the projected increases in the dependency ratio, and the pay-as-you go nature of state pension schemes.

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Should age discrimination be made illegal in the workplace?

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Some people are going foreign for better studies and getting better jobs. For example, most of Olympia champions will agree to choose to study in Australia because the learning environment here is very good. Besides, they can find a suitable job with high salary which difficult to find in their country. therefore, talented people can't use their knowledge and promote their full potential.

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When talented people have emigrated in foreign countries, the rate of unemployment may be raised by the standardized labor. So, many countries consider to adjust the education and economy to attract them return to their own countries. One side, it help for decreasing the rate of unemployment. Other side, it help for their countries have a effective labor to develop country.

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When talented people leave their country, the country loses a good source of human capital for development. According to economic theories, this factor is the most important compared to factor such as finance, natural resources of economic structure.

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It completely depends on individual. Everybody have a right of freedom.
They absolutely choose the best education foundation to develop their ability. Every individual is seeking a better opportunity to grow themselves as well as money and experience which is able to accure in their contries.