In the John Waters-esque sector of northwest Baltimore — equal parts kitschy, sketchy, artsy and weird — Gerry Mak and Sarah Magida sauntered through a small ethnic market stocked with Japanese eggplant, mint chutney and fresh turmeric.... “I have $80 bucks left!” Magida said. “I’m so happy!” “I have $12,” Mak said with a frown. The two friends weren’t tabulating the cash in their wallets but what remained of the monthly allotment on their Supplemental Nutrition Assistance Program debit cards, the official new term for...food stamps. Magida, a 30-year-old art school graduate, had been installing museum exhibits for a living...