1. We don't always buy from you, we buy from anyone who's willing to sell us.
2. You're clearly too stupid to understand country economics. Son, this is how it works. 'Tanzania' doesn't grow maize, farmers in Tanzania grow maize. After growing maize, they look for the most lucrative market. That market is NOT Tanzania because Tanzanians are too poor to buy the maize at competitive prices (which contradicts your earlier assertions of having lower unemployment rates - oops, maybe mmeandikwa kazi za ujinga mnalipwa dollar hamsini kwa mwezi). That market is Kenya thus your farmers bring their maize to Kenya to sell while 78% of you starve. Read son, read. you'll understand someday.