The article below the cartoon states:
A survey of American economists found that 90 percent of them regarded minimum wage laws as increasing the rate of unemployment among low-skilled workers. Inexperience is often the problem. Only about two percent of Americans over the age of 24 earned the minimum wage.
Advocates of minimum wage laws usually base their support of such laws on their estimate of how much a worker “needs” in order to have “a living wage” — or on some other criterion that pays little or no attention to the worker’s skill level, experience or general productivity. So it is hardly surprising that minimum wage laws set wages that price many a young worker out of a job.
Support of an increase in the minimum wage is political–it is not based on economic realities. Unions support it because it allows them to negotiate for higher wages. Eventually this cycle leads to inflation and hurts low-income wage earners the most.