Higher real wage and unit labour costs in areas where unemployment is too high would undermine job creation and thus reduce demand and supply even further. Of course, once full employment has been reached, real wages can and should grow in line with productivity increases.
Of course, as my colleagues in the MB have said, we need better metrics to  3/5  BIS - Central bankers' speeches  precisely find out to what extent the costs are higher because the quality is higher. In our household, if it is more expensive, it is actually better.