I can't speak to Egypt or Senegal, but i think you overlook that the WTO/neoliberal ideology is all about producing for export markets and displacing "inefficient" peasants. it's all about not valuing their farmers! So i can bet farmers in those countries were getting a crappy deal for a long time, and in many cases, were undercut by dumping from the EU, making them more dependent on imports and exposed to the global markets. In Haiti, the Clinton admin imposed IMF/trade liberalization as the price of restoring Aristide. The US then started dumping rice into Haiti, driving their farmers off the land. Small wonder then they are suffering so much now, with reduced domestic supply and high rice prices.