Union Labor?

Israel in Egypt (1867) Edward Poynter. Oil on canvas, 54 x 125 inches. Click to embiggenate.

"In a period of twenty years, these four quarries would supply more than two million blocks of store to construct the Great Pyramid, on average more than 100,000 blocks a year. The men probably worked  a ten-hour day, which would mean that a completed block was quarried, transported, and pushed into place every three minutes - 365 days a year! One wonders which is more remarkable, the Great Pyramid's construction or the social organization needed to bring about that construction." - Bob Brier and Jean Pierre-Houdin in The Secret of the Great Pyramid.