If you force them to a fixed hourly wage, you can't hire that person and still let them work those hours in those places, because you'd be paying them for 40 hours while they're still only working 10. So the now money-losing employee either gets a pink slip or has to work different hours.
Next, you provide incentive payments for drivers proportional to the extra amount they brought in above and beyond the minimum wage for the hours they drove, as a slice of the pool of revenues after subtracting out minimum wages and benefits. Then you stack rank your drivers at the end of each half, and fire the bottom 20%.
I'm not even advocating this approach, I'm just saying there are ways of incentivizing this that are shown to work. This part here isn't rocket science.
Zero chance the bulk of the surplus gets distributed to the drivers. I know of a few New York medallion era brokers keeping an eye on the California market, and they aren’t doing it because they plan on passing along profits.