I've always been a bit skeptical about modern estimates of the resources that were used in building the pyramids. The people who built the pyramids spent generations moving multi-ton blocks of stone without pulleys or wheels. It stands to reason that they knew a hell of a lot more about moving multi-ton blocks of stone without pulleys or wheels than any modern archeologist.
Now a retired carpenter thinks he has found some of their secrets. The video and web site are distressingly obscure on the details, but he gives enough information that I believe him. The link comes from Dean Esmay, my own personal YouTube search engine: