Ideally, the expert's advice would be a product in itself. For the expert to be incentivized to give unbiased* advice, 100% of their income needs to be from th

Ideally, the expert's advice would be a product in itself. For the expert to be incentivized to give unbiased* advice, 100% of their income needs to be from the customer, and 0% from the car maker. Which Bluntly put, this boils down to making marketing departments illegal. (Note that a car magazine with ads, where the experts' income depends on both readers' eyeballs and car makers' money, is still way, way better than relying on car ads.) * 'unbribed' would be more accurate, as there would still be some biases to make the readers feel happy to follow their advice, e.g. favouring short-term satisfaction over long-term safety, etc.