Collecting and eating more than necessary also causes prayasa, or unnecessary endeavor. By God's arrangement, anyone in any part of the world can live very peacefully if he has some land and a milk cow. There is no need for man to move from one place to another to earn a livelihood, for one can produce food grains locally and get milk from cows. That can solve all economic problems. Fortunately, man has been given higher intelligence for the cultivation of Krsna consciousness, or the understanding of God, one's relationship with Him, and the ultimate goal of life, love of God. Unfortunately, so-called civilized man, not caring for God realization, utilizes his intelligence for getting more than necessary and simply eat to satisfy the tongue.

By God's arrangement there is sufficient scope for the production of milk and grains for human beings all over the world, but instead of using his higher intelligence to cultivate God consciousness, so-called intelligent men misuse their intelligence to produce many unnecessary and unwanted things. Thus factories, slaughterhouses, brothels and liquor shops are opened. If people are advised not to collect too many goods, eat too much or work unnecessarily to possess artificial amenities, they think they are being advised to return to a primitive way of life. Generally people do not like to accept plain living and high thinking. That is their unfortunate position.

(From Srila Prabhupada's purport to Nectar of Instruction, verse 2)