The existence of a minimum wage rate limits the freedoms of both employers and workers in the labor market. For employers it sets the minimum rate they can pay, even if they believe the job should pay less. For employees, the minimum wage rate makes it harder to compete with workers who will just take the rate to get a job.
A minimum wage limits the freedom of both employers and workers in the labor market. This is due to the government imposing limits on an employer's ability to offer a very low wage to workers that are willing to work for it.