What is the most significant factor, enabling unions to negotiate increased wages for their members?

Question

Quizplus · Accepted Answer

Unions can negotiate higher wages by effectively decreasing the supply of labour in the union sector. This is achieved through mechanisms such as setting higher standards for entry into the profession or advocating for regulations that limit the number of workers in certain roles, thereby increasing the bargaining power of the existing workforce.

What Is the Most Significant Factor, Enabling Unions to Negotiate