Jamieson, Fausset and Brown on Genesis 41:53-56

53-56. The seven years of plenteousness ... ended--Over and above the proportion purchased for the government during the years of plenty, the people could still have husbanded much for future use. But improvident as men commonly are in the time of prosperity, they found themselves in want, and would have starved by thousands had not Joseph anticipated and provided for the protracted calamity.