Final answer:
John Stuart Mill would find banning the sale of alcohol as a problem to be an acceptable action to address social problems.
Step-by-step explanation:
John Stuart Mill, a proponent of utilitarianism and individual freedom, believed that the government should intervene under certain circumstances to improve the lives of the working class. One action that Mill would find acceptable is banning the sale of alcohol to address social problems. By placing restrictions on middle-class business owners, the government can protect the working class from potential harm caused by excessive alcohol consumption. This aligns with Mill's belief in maximizing individual freedom by limiting actions that harm others.