Man, not God, is responsible for starvation anywhere in our world.
Likewise, Man, not God, is responsible for his own success with regard to material things.
I might also add that if you think that there is no scriptural precedent for God being the culprit with regard to famine, spend some more time reading the Hebrew Scriptures. My argument though, is that God is not responsible.
Even per Jehovah's Witness doctrine, this system of things is under Satan's control. So why, then, should I thank him for anything that I get while living under Satan's system? Shouldn't I be thanking Satan? Isn't this a fair question?