“supply and demand" is really a theorem about microeconomics and you’re on shaky ground when you start trying to apply it to macro phenomena. People do it all the time, but that doesn’t make it valid, because…
“supply and demand” requires that everything else in the market is held constant; you can’t make that assumption for macro phenomena, and you especially can’t do so when discussing wages.
“supply and demand” as commonly quoted is a theorem that depends on certain assumptions about the demand curves of the goods in question, and it’s at least not obvious that the demand curves for labor satisfy those assumptions.
Looking at your other comments, you don’t really seem to be interested in understanding anything, however, so I’ll let you resume your regularly scheduled trolling now.