I don't understand. If Egyptian government officials like Joseph and Qarun are very rich, would not the Pharaoh be richer than them ?
I still think Mansa Mosa is still the richest man in the world having many of the gold mines at that time
https://en.wikipedia.org/wiki/Musa_I_of_Mali
I have made a whole article on thim that u shoot definitely read
https://steemit.com/money/@salamen/the-richest-man-to-have-ever-lived-mansa-musa