You are purposefully ignoring the normal explanation, which is this: because wages are sticky, firms that need to cut costs in a recession are more likely to lay off people than they are to give pay cuts. Inflation helps to weaken that rigidity so that job losses are not as large. Maybe you know that.

You claim that central banks depreciate the currency because they "think wages among the working class are too high." But rhetorically, you are doing more than just referring to the explanation I gave above. You are implying that central banks "think" working class wages are too high, and want to lower them to hurt working class people.

Which is the opposite of the standard explanation - the purpose of inflation in that instance is to implicitly reduce the downward rigidity of wages so that employment does not contract as much in a downturn.

Presumably you, champion of the working class, would rather more people be unemployed?