Water wells? They might dry up next year or be dug in the wrong spot or poisoned or something. It might not work! Think of what the money could have been used for!
Inexpensive housing? If they aren't built right they'll be no better off than their current shelter and people may steal the materials to resell or the environment might be harmed. It might not work! Think of what the money could have been used for!
Farm technology? They might eat the seeds instead of planting them or locusts may eat the crops or they have no way to maintain the tractors or whatever. It might not work! Think of what the money could have been used for!
Anything tried might fail to combat poverty as much as hoped. Is that a reason to not try?
Anything choosen to spend money on will not be "_really_ well spent" according to someone's opinion. Is that a reason to vacilate or cancel your own project?
Obviously you think giving poor kids a computer is *not* "_really_ well spent" but you offer no specifics as to what would be better and why. And frankly, Negroponte and lots of other people disagree with your assessment. That makes neither them nor you right or wrong. You just care about different aspects of the overall problem.