[Principled]

The absolute truth is that total purchasing power will remain constant, ...

Yes. Which is why it is nonsense to talk about nominal wages.

[Your Nightmare]

Yes. Which is why it is nonsense to talk about nominal wages.

No it's not. Wages are very difficult to change en masse (see "sticky wages"). If nominal wages can't fall, for "purchasing power" to remain constant, consumer prices must rise.