Who can blame them? Minimum wage in Chicago, at $8.25, is already $1 more than the federal requirement. Yet if one works 40 hours a week, for 52 weeks a year, the resulting salary is $17,160 before taxes, well below the poverty level for a family of three. In November, the Census Bureau announced that more than 16 percent of the population lived in poverty, including almost 20 percent of American children. This figure had risen from 14.3 percent in 2009 and was at its highest level since 1993.