Various stories from people who have been on the other side of this tend to concur. I unfortunately cannot find the story, but a Pakistani call center scam artist who was hired by one of these crime syndicates went on record recently talking about the experience (I think it was in a podcast) and he said that he was recruited into a well paid, well organized machine and the workers themselves were treated well. He painted a picture of a hyper-competitive Glengarry Glen Ross-esque environment with leaderboards and the like, where people fought over and protected their "leads" (marks). The only struggle for him was not the working conditions, but rather with the moral aspects when he realized what he was doing.

Usually, as you would expect, the employees don't really realize until after they are recruited in what they are doing, and oftentimes the money and job is cushy enough they are willing to set aside their morals to do it.