Answer is simple – They are loyal and they know more. Employees in middle-age have bigger experience than young ones. Through their life they worked in different places, on different posts. It causes that they have a practical knowledge. Young employees have theoretical knowledge only from schools. Important matter for employers is loyalty of employees. Older employees do not require often changes. In contrast to young employees, they want to have a stabile work. About advantage over young workers denote fact, that workers in middle-age are more responsible. They inspire bigger trust in customers.
Older employees do not need maternity or paternity leave, because they do not have small children. They are responsible and well-organised. Older employees inspire bigger trust in customers.