The cash-strapped city of Los Angeles is trying to create a new source of revenue by asking voters to tax medical marijuana dispensaries. Measure M, if approved, would allow to the city to collect $50 out of each $1,000 in "gross reimbursements" that dispensaries receive from their patients. That could generate $10 million a year, which the city can use to pay for basic services such police, libraries and street repairs. "This is something we cannot say 'no' to," Councilwoman Janice Hahn said.