Looks like you are right Dave!
Pyramids of Giza | National Geographic
The ancient engineering feats at Giza were so impressive that even today scientists can't be sure how the pyramids were built. Yet they have learned much about the people who built them and the political power necessary to make it happen.
The builders were skilled, well-fed Egyptian workers who lived in a nearby temporary city. Archaeological digs on the fascinating site have revealed a highly organized community, rich with resources, that must have been backed by strong central authority.
It's likely that communities across Egypt contributed workers, as well as food and other essentials, for what became in some ways a national project to display the wealth and control of the ancient pharaohs.