An assumption is that robots will not have sophisticated AI and will always need a human to manage it. What happens when the AI is able to manage it and has no need for human managers or a corporation?
Suppose the self driving car is able to act as a self contained corporation, earn it's own profit, pay for it's own repairs, hire or pay for it's own new designs based on data it and it's clones collected from passengers?
The problem is either going to be "who owns the robots" or "who pays the taxes". Human beings don't want to pay taxes but don't want robots to pay taxes because a very small group of humans expect to own in concentrated fashion the robots which they don't want taxes.
But there is no technical reason why robots require human owners. An autonomous agent which can take on all the functions of those humans need not even be very smart or sophisticated to have the ability to interact as a self contained business or individual economic unit.