It makes sense that all voices would be Waters, since the "voices" are all part of his (Pink's) imagination.

__________________
Taking away from you for the greater good.

"Socialism is a philosophy of failure, the creed of ignorance, and the gospel of envy, its inherent virtue is the equal sharing of misery".-- Winston Churchill

"Islam isn't in America to be equal to any other faith, but to become dominant" - Omar Ahmed, C.A.I.R.)