"2-6 Seven cows… seven ears of grain: Although, as we have seen, Pharaoh's dreaming stemmed from Joseph, the content of his dreams differed profoundly from that of Joseph's. Pharaoh dreamed only of produce and animals but not of work. Joseph's dreams, in contrast, began from the start with the image of work—the brothers gathering sheaves in the field.
"This aptly reflects the difference between how holy individuals and unholy individuals receive sustenance from on high. The holy receive sustenance through the work of aligning themselves with God's will. When they do so, Divine sustenance flows to them naturally. The unholy balk at the idea of self-discipline and work and therefore refuse to conform to God's will; they are therefore sustained by God in a backhanded fashion."
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7th Lubavitcher Rebbe