Because they were ordered to.
1436 b.C.
It took 7 years to build king Tutankhamen's tomb.
unskilled workers were to, at the time, build the the great pyramid because eventhough they had slaves they werent enough so the king forced them into it as well :)
The Kings (like King Tut) had people who worked for them to build them their pyramids. In some cases, workers were buried alive with the deceased king or queen to serve them in the afterworld.
what
gold
Akhenaten
egypty
Egypt
Hunting and whipping slaves
he was 19
Tutankhamen