Answer:
Age discrimination
Step-by-step explanation:
In the US, nearly 53 years ago, the Age Discrimination in Employment Act (ADEA) was passed to prohibit discrimination against employees that are older than 40. This law was passed because it was common for "older" employees or job applicants to be discriminated during hiring, granting promotions and compensations, being fired for no other reason than being old, etc.
Sadly, those practices are common in other countries and they seriously affect the well being of older people, because if you are considered to old to work when you are 40 and you should retire at 65, then what do you do during 25 years. A law doesn't erase or eliminate a problem, but it at least provides a tool for employees to uphold their rights.