Need is satiable,

  Need is satiable,greed not.

 Need can be understood and allowed.

 Greed is something peculiar feeling present mostly in human beings.

 Give the cattle lots of green grass. Once their stomatch is full they will just ignore it and sleep on it.

 Greed has arisen from currency as a store means. Currency stores wealth storage is the whole culprit.

 Remember Mecanna's gold? towards ending part ? lots of gold but how to run away from the quake and save life was the problem. The hero gets luckly of it which was in the saddle.