That interview is from May 2006.[1] We don't know if it's one of the cashiers and we don't know how this specific scheme played out.
Yes, you can often hire a cashier. Typically, this guy has some plastic and an encoder, but he doesn't have a steady supply of data to encode the cards. He's working with you because you have data to cards with a high limit and you can verify that they're valid. Most of the time, he's not even on the street. He'll encode them in the car and have someone else run up to the ATMs.
[1] http://web.archive.org/web/20061115154615/http://smallworldp...