The Netherlands is, too, in the long run. But for now it's economically sustainable.
There are a few interesting studies in this area, California's agricultural section's tug-of-war with its residents for water is the biggest one that comes to mind, and the lesson you get is that industry uses up the lion's share of the water out of greed and sloth, but enough pressure will force them to curtail usage.
I wouldn’t want to live there, but seems like a lot of bulk commodities, and products come in and out of Oklahoma and there is still plenty of room...
None of the other developed countries have vast interior deserts. The east and west coasts and some parts of the Mississippi and Great Lakes watersheds are plenty overpopulated.