How would people with nothing buy rice from local farmers anyway? As long as the US sends only enough rice for people to be fed until they are back on their fee

How would people with nothing buy rice from local farmers anyway? As long as the US sends only enough rice for people to be fed until they are back on their feet there shouldn't be a problem, since there won't be piles and piles of free rice floating around once the disaster has passed and people are again able to afford to pay local farmers.