That’s a long article, I’ll dig through it later.

I’m guessing it’s a mix. Like the people in that village would be the skilled workers, while slaves provided the labor in moving the blocks from the mountains to the work site.

Redding, who has worked at archaeological sites all over the Middle East, “was astounded by the amount of cattle bone he was finding,” says Lehner. He could identify much of it as “young, under two years of age, and it tended to be male.” Here was evidence of many people—presumably not slaves or common laborers, but skilled workers—feasting on prime beef, the best meat available.

So I’m sure there were a lot of “employees” at the site, I just also think it’s highly likely slaves did most of the work bringing materials to the site. And that seems to be what Rogan is talking about (how did the stones end up here).