Weapons of high strategic value, in this case, the mentioned nuclear bomb, get a near infinite funding program. Because they create a great advantage for the country in war and the like.
Yet there really is no immediate advantage to a country for stopping starvation outside of it's borders.
The quickest requirement for this to become real would be a creation of a one world country. Because when it's your citizens that are starving, your workforce, it becomes a diffrent problem with a different level of priority.