Commentary for Genesis 47:15

אפס — Render this as the Targum does: שלים IS AT AN END.

AND WHEN THE MONEY WAS ALL SPENT IN THE LAND OF EGYPT, AND IN THE LAND OF CANAAN, ALL THE EGYPTIANS CAME UNTO JOSEPH, etc. Scripture mentions that the money in the land of Canaan had been exhausted because when the Egyptians came before Joseph they reminded him of this, for they said: “Since the money is also exhausted in the land of Canaan, and since they will no longer come to buy food, why should we die in thy presence? For the money is at an end, and you will cause our death in vain, for the food will remain in your hand, and no man shall buy it.”

ולמה נמות….כי אפס כסף, "why should we die …for there is no more money?" The people complained that Joseph had proved unwilling to accept any payment other than money in return for grain. They argued that they were not destitute, they could pay him with other chattels; why should they die merely because they could not pay cash? This is why Joseph replied that he was willing to accept their cattle in payment only "if indeed there is no more money." Joseph's reason for all this was to impoverish the Egyptians so that his brothers would not be in an economically inferior position vis-a-vis the Egyptians. Joseph was very clever not to accept any payment other than money as long as there was cash around. As long as the Egyptians still had their livestock they would have to provide fodder for their animals; presumably one effect of the famine was the absence of grazing land. The Egyptians therefore had to feed their livestock with barley. This in turn led to the money supply becoming completely exhausted within a year. As a result of Joseph's strategy the brothers who arrived during the second year of the famine were wealthy compared to the average Egyptian at that time.