Martin is exhibiting ageism.
Ageism, often called age age prejudice, is a form of discrimination of individuals because of their age. It happens when people are denied opportunities or resources as a result of being judged to old. This term was first used by Robert Neil Butler in 1969.
The Age Discrimination in Employment Act ( ADEA ) forbids age discrimination in people that are over 40 years old, meaning that their age is not taken into consideration when seeking employment.
Ageists attitudes ( stereotypes against old people ) as used by Martin, often describe older people as weak, fragile, 'past sale date' and without mental or physical capacities to learn or acquire new skills.