Reminds me of an interview I saw decades ago of an old man in the Andes, in an area where people often live to over 100. They approached the oldest guy in the village who was in his field hoeing and stopped to talk to them. They told him they were trying to find out how he had lived so long.
“Why?”
“So we can tell other people the secret, and they can live to over 100 too.”
“Why would anyone want to be this old?” For him it was just more years of hard work.
Much of, "The Man Who Would be King," was filmed in the Atlas mountains of Morocco. For the character of Kafu Selim, they found a local centenarian working as a security guard at an olive orchard.
During the shooting of the film, John Huston noticed that he kept dozing off, and Huston was worried that the pace of production may have been too much for him. Huston had a talk with him to see if he was going to be ok. The old man told him the filming was easy, but the night shift at the olive orchard was wearing him out.
He didn't realize he was going to be paid quite handsomely for his screen time and thought he had to keep his security job to make ends meet.