Pure input no output availabe for consumption leads to a dead end?

This morning when I was reading the Bible on the skytrain, one Bible verse (Matthew 21:18-19) shed me a light on our life style. I came to conclusion that if a person only kept on consuming resources from the universe and not producing anything that can fulfill others, the life of the person were in the process of withering.

Matthew 21:18-19
Early in the morning, as he was on his way back to the city, he was hungry. Seeing a fig tree by the road, he went up to it but found nothing on it except leaves. Then he said to it, "May you never bear fruit again!" Immediately the tree withered.