It is true that it takes energy to develop, treat and deliver water, but this does not mean that we must face a world of scarcity. Given a strong supply of clean and safe energy even saline or polluted water can be turned into pristine drinking water via desalination and delivered to where it is needed. Read this paper on the link between Advanced Nuclear Reactors and Thermal Desalination. The liquid fuel Thorium Reactor was invented by Dr. Alvin Weinberg of the Oak Ridge National Laboratory. By redeploying this technology the United States could switch from an economy based on carbon pollution and shortage, to one based on carbon-free terrestrial energy and abundance (of both power and water.)
