Plus...a worker's village excavated on the Giza plateau contained large rows of bakeries, evidence that the workers ate meat, fish and vegetables, had extraordinarily good healthcare (evidence of life saving amputations and setting of broken bones, etc).

Imagine you're an individual young man in ancient Egypt, and it word comes around that the king is building the world's biggest triangle or whatever, and they need help moving the giant stone blocks. Any young men who volunteer will be fed lots of great food and beer. They're recruiting young women in the tens of thousands to work in the kitchens, bakeries and breweries.

"Hey I think I'm going to Giza to check out this big triangle thing."