Back to Assignment Attempts Keep the Highest / 2 5. The theory of efficiency wages Why might some firms voluntarily pay workers a wage above the market equilibrium, even in the presence of surplus labor? Check all that apply. O Paying higher wages encourages workers to be more productive. O Higher wages cause workers to shirk more of their responsibilities. O Paying higher wages enhances workers to adopt healthier lifestyles, enhancing their productivity. O Paying higher wages can reduce a firm's training costs