Though, to the general point, a minimum wage driver is probably not as big a proportion of rental vehicle costs as many assume.
Of course this would be a company owned car and they'd be reimbursed for fuel and stuff so at least the company is the one taking that risk. But if they're real employees, firing ones that can't make fifteen rides happen in eight hours is just kind of the obvious result.
I think its the opposite of conservative to ignore the greatest cost of being an uber driver - your car.
Drivers received about $23.50/hr according to it.
The Parrot and Reich recommendations https://irle.berkeley.edu/files/2020/07/Parrott-Reich-Seattl... are much more generous in terms of estimating expenses. Neither considers a company car model which might imply drivers taking shifts in one vehicle.