I should probably provide some perspective on this. America doesn't bother outsourcing their food surpluses because there's no economic or corporate incentive. Third world distribution networks are notoriously unreliable and corrupt governments make it not worth the investment when most of the US agriculture is already sold to the animal industries. However, if everyone were to become vegan, outsourcing these surpluses would become necessary to close the profit margin. Investing in reliable distribution and a mutually beneficial coalition would become a very serious concern, and with any luck (hiccups notwithstanding) there would eventually be a thriving intercontinental market and we'd be well on our way to ending a large chunk of world hunger. Obviously rather idealistic, but it provides a solution for both the political interests you mention and the interest of the well-intentioned vegans.