For the second time in nine months, labor inspectors on plantations where Starbucks buys coffee in Brazil have found slave labor. These aren’t just any plantations; these are farms that are “certified” to their C.A.F.E. Practices standards. Starbucks holds up their C.A.F.E. Practices standards as the key to their commitment to source “99% ethical coffee.” But it’s becoming more and more clear: These standards are glossing over a serious problem.