"cannot".. Whilst a different aspect, this is certainly corrupted: https://news.ycombinator.com/item?id=13785564

I'd agree with you if the system was entirely open to audit.. but it isn't.

Regulated meters with security seals does provide the assurance... but i'm not saying it is a step forward.

I generally defend Uber, but some of their actions I do struggle with.

Uber's receipt gives you a map with times, distances and a breakdown of costs. A taxi meter gives you a total, but it has a seal of approval. I know which one gives me a sense of assurance.