I used to get calls like this on my work phone when I was working as a mechanic. The scammer would tell me to send him money with some sort of green dot card or something. He kept saying once I send it I will be enjoying financial freedom. I don't think they specifically target old people, maybe just people that are more likely to jump at opportunities before they process how ludicrous they are. I was in a blue-collar environment, maybe that was part of it, though I'm not sure how they would have known that.