Answer: Wages are flexible if the economy is self-regulating.
Step-by-step explanation:
Classical economists believe that the economy is self-regulating. This means that if the economy is not at equilibrium, it will return to equilibrium if it is left without interference.
For this to happen, inputs such as wages have to flexible to enable them to adjust to market conditions and thus take the Economy back to equilibrium.
For instance, if there is a recession, wages will reduce so that the prices that the producers can charge will reduce as well which will enable supply to match demand and bring the economy back to equilibrium.