I recently saw a letter to the editor or an online comment that an employer will pay you what your worth, implying take it or leave it.
But who is deciding "worth"? Is it an employer who has carefully considered the benefits of an employee and what the current market price is for said employee? Or is it a penny-pinching Scrooge who will pay as little as possible, regardless of how much benefit (and profit) the employee will bring to the employer?
If the labor market is truly free, both employer and employee will have sufficient information to judge what a "fair" wage is. If the labor market is truly free, potential employees should be free to enter or leave it. Too often, this is not the case, many potential employees are not free to leave the labor market, unless there is free food, shelter, and clothing for themselves and their families.