Minimum wage is the water. The water is what is killing people. Ergo, the comic's implication is that minimum wage is destructive, and that welfare is a (broken) attempt to save people from the minimum wage. The artist does not want to leave them to drown; they want to get rid of the water.
Unfortunately, because this artist is just pandering to the base instead of trying to get any ideas across, this cartoon makes no attempt to explain why the minimum wage would be harmful to low-income workers.