[RobFromGa]

That prices may change is immaterial until you take the corresponding change in wages into account.

Unless you are on a fixed income, and fixed after-tax savings and don't have wages.

[Principled]

That prices may change is immaterial until you take the corresponding change in wages and ROI into account.

My pretax investments will gain.

I omitted the "AND ROI" from the post to which you replied. I added it above with emphasis. It wasn't in my original post but should've been.