There's no need for that. Rideshare drivers' pay overwhelmingly goes to cost of labor rather than fuel or maintenance, especially in big cities. Uber/Lyft take another 25-40% from the gross fare the passenger pays. Cruise will be capturing all of that and only needs to pass a fraction on to the consumer to get an unassailable price advantage.

This is only true now, until such rides become the norm. Then the margins will shrink and companies will optimize every way they can.