Pennsylvania's auditor general has found hundreds of thousands of dollars for HIV and AIDS spending in Philadelphia that are either unaccounted for or unnecessary. A small portion of the funds were spent on incentives for people who participated in prevention programs, which the auditor general says is wasteful in this time of budgetary constraints. But some experts say this is standard procedure. "Incentives are not something that's new. And it's certainly not something that the Philadelphia Department of Health created. These are things that we do in biomedical research all the time," said Sarah Bass, a professor of public health at Temple.