In some countries, government has made a law that employers cannot reject a candidates because of their age. I think this change is completely positive for the society.
Firstly, age does not always show how well person can do a job. Many older workers have a lot of experience and useful skills. They are more responsible and better in solving problems. If companies refuse them only because of age, they may lose good employee. In same way, young people can also be very creative and full of energy. Employers should focus on the ability of person, not on the age.
Secondly, this law help to reduce discrimination in workplace. Without this rule, some companies might prefer only young workers or only older ones. This is unfair and can create problems in society. When people have equal chance to find a work, they feel more confident about their future.
Finally, allowing people of all ages to work is good for economy. More people will have job and can support their families. It also helps country to develop in stable way.
In conclusion, making illegal to reject candidates because of their age is positive development. It creates fairness, reduce discrimination and benefits the society.