I doubt that people in the U.S.A. for instance will conciously reduce their consumption of coffee, soy bean products etc in order to ensure that food remains affordable for the poorest in the world. Given the rise in food prices over the last few years, this doesn't appear to be the case. To be quite frank, so long as it happens in another country most people would let others starve to death.
Are you sure thats the case and its not the fact that USA is moving towards organic foods and thus reducing output of beef and produce