Arguments about "why" just aren't helpful here. Everyone thinks they're smarter than everyone else and knows policies that will be perfect, and everyone is wrong for the same reasons. It's a cyclic feedback market and it just does this stuff, for the most part.
But you absolutely can't look at things with a microscope and say "salaries don't keep up with inflation", because that's (almost by definition) never true.
Increased prices of labour or products is always a consequence of inflation and never the cause of inflation.
And to my point upthread: the factors that result in changes in the money supply are themselves subject to influence by lots of things, including stuff like the rate of inflation. It is absolutely, 100%, a feedback network.
So an argument of the form "salaries don't keep up with inflation" is backwards (usually). They already did!