On the other hand, a union that's run by people depending on uber as a full time source of income has a significant interest in reducing the number of people dr

On the other hand, a union that's run by people depending on uber as a full time source of income has a significant interest in reducing the number of people driving for a "fling" or part time - more surge pricing, more guarantee minimum income from uber, less risk of low ratings leading to punitive action, since uber can't just replace them easily. My point is that while unions benefit some workers, they don't benefit all workers. It's not a black and white situation.