Earlier quoted context omitted.
That's one of the easiest things there is to believe. You need to work on your believing.
You might be right that the whole thing will fall apart. But if this place is indeed the equivalent to Manhattan I can understand the disbelief. Compared to the trillions tied up in real estate the cost of a pipeline to NYC would be trivial. Yeah it might cost $50b (probably much, much less but lets go crazy) but with at least 10mm people around to receive the water it's $5k per person amortized over a decade it come…
http://data.un.org/CountryProfile.aspx?crName=Yemen gives a gross income per capita for Yemen of around $1300. http://en.m.wikipedia.org/wiki/Economy_of_Yemen has a more optimistic $2200. Sana'a may be richer, but I guess the poor will be significantly below that.
I don't find it strange that they will not be able to pay for the infrastructure and the additional costs of desalination and of pumping the water to the city (over 2 km up)
Also, looking at http://files.transparency.org/content/download/700/3007/file..., Yemen is perceived to be extremely corrupt. That means that its population may not trust their government with that amount of money, even if they could afford to pay it.