Well, now, let's see Dimp-Dimp you say that
"... ALL of them hold prices AND purchasing power constant ..." when you're claiming that there is universal prediction of drops in consumption and then
"... hold prices constant, ... and purchasing power constant ..." when you argue that this is the reason for a "windfall".
It really must be comforting to you to have such a flexible set of economic standards that you can use the same set of circumstances on each side of the argument to try to "prove" that different things are caused by them.
Some people take that to mean you don't know what you're talking about - or that you believe you can befuddle all us little wage-earning simpletons that are beneath your ken.