When man does not trust our Father in Heaven as the provider of these things, then MAN can tell them that they are in limited supply and thus lead men to simple things like rationing all the way to wars, to agreeing to limit population numbers (ie killing others).

Therefore take no thought, saying, What shall we eat? or, What shall we drink? or, Wherewithal shall we be clothed? (For after all these things do the nations/gentiles seek:) for your heavenly Father knoweth that ye have need of all these things. But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you.