The opposition is based not so much on the principles of liberty as a practical reason: the increase is causing businesses to lay off people.
According to the article, which is entitled "Minimum Wage Resistance," several localities in Illinois have chosen to opt out of county increases in the minimum wage to $15 an hour. The author of the article, Richard Berman, writes:
"What are these city leaders seeing that other states and localities have missed? Perhaps it's the destructive effects of their neighbors' good intentions."
Berman then goes on to cite example after example of how increases in the minimum wage have caused businesses to close down and people to be laid off from their jobs.
As a result of the $12 minimum wage that was enacted in Arizona, an Italian restaurant in Tucson is closing, laying off 43 employees. The owners said, "I hired so many kids that I coached that is what's sad."