Naive question: What is wrong with this? Lots of gov't agencies in highly developed countries operate similarly. User fees account for a non-trivial portion of department budgets. A more simple example: Should the Dept of Motor Vehicles (DMV) charge zero, low, medium, high, or infinity money to get a driver's license?

In principle there is nothing wrong with it, as long as the FDA or other testing body retains an appropriate impartiality or lack of bias (perceived or real). The issue, however, would be a lax system that allows revolving door access between the approval body and the industry that is seeking approval. Ironically, the common refrain becomes that their industry specific knowledge means they "must" be the only possible candidates for the role, which just so conveniently starts the revolving door swinging between leadership in industry and upper roles in regulatory bodies.