That’s a brainless comment. The pharaoh didn’t have to steal it, he owned it, and was overlord of the entire population, which means he and his officials directed all economic activity.
Didn’t the pharaoh really acquire much of his wealth by theft? Did the prior generations in his family pay taxes on income and property or did they exempt themselves from paying any taxes? Did they use taxes on the serfs to build up their own wealth. Technically you can say that is not stealing defined by the pharaoh’s laws. I think most was acquired by stealing. I believe God would view it as stealing as well.