This is way too simple and is contradicted, though not refuted, by simple responses. First, if the real wage reduction is associated with an employment increase, there is a gain to the working class that offsets the loss to some extent, possibly great. Second, as employment increases, there is upward pressure on real wages that offsets the initial push. Third, if there is slack in the economy and prices are sticky, the effect of an increase in aggregate demand could augment employment by increasing both supply and demand for labor.
mbs