Before using the "Cry wolf" argument, please remember that in the original fable, eventually the wolf did come.
Maybe we'll take this next round of automation in stride, we'll adapt to the technology, and the economy will adjust. Maybe the cries of "Wolf!" will be just cries, again. But maybe not. To say that the cries of "Wolf!" will NEVER be valid is actually a bigger and harder to prove conjecture than that at some point the cry will be valid..