Nations most notable of foreign aid by the U.S. and it's allies include Pakistan, Iraq, Afghanistan, Iran, and North Korea.
These nations routinely enforce policies detrimental to the safety of the U.S. and it's allies such as training and harboring terrorism, massive human rights violations, and the construction and sale of arms and weapons of mass destruction.
Foreign aid in the form of money and food to these countries has been shown time and time again to only be used to further develop such policies and not for their intended purposes including feeding the poor and starving, infrastructure construction, and the pursuit of democratic ideologies.
Those wishing to receive aid must clearly demonstrate changes to their policies and have diplomats witness it in person to confirm it.