When Walgreen Co., the drugstore giant, met with Delaware officials earlier this year to argue over Medicaid reimbursement rates to pay for poor people's subsidized medicine, the company asked a state official with a unique perspective to sit in.

When Walgreen Co., the drugstore giant, met with Delaware officials earlier this year to argue over Medicaid reimbursement rates to pay for poor people's subsidized medicine, the company asked a state official with a unique perspective to sit in.