lack of imagination
Anybody who would fall for the initial line is not only gullible and eager to please, but not very bright. I have had interesting conversations with Americans who cannot conceive -- really are flabbergasted and can't imagine -- just basic life-style differences such as toilets flushed with a chain (UK, old-style), places on earth where you can't drink water out of the tap (fun in Pakistan) and so on. They really do see everybody being just like themselves, having what they have, doing what they do, or so mind-boggling different that it cannot be imagined (Muslims living in, say, Syria or the Lebanon being a cloud of grey unknowableness). So I can accept that they really do think kids in African orphanages need mobiles phones, DVD players, etc.
Yes they are sad losers, but not untypical. I have singled out Americans here, but could fine the same comatose imagination cells in other brains.