Note that while U.S. food aid certainly does help the hungry, it is not just done to feed the hungry. It is also a subsidy to American farmers.

Food aid in response to a natural disaster (e.g. the tsunami a few years ago) is one thing. However, long term food aid is a disaster in itself for the country receiving it. The local farmers can't compete with free food so they get wiped out. That creates permanent dependency on food aid which is the opposite of what's needed.