Great answer.

The companies owning the machines would have to pass on their increased costs for paying the tax to their customers, ultimately that is me and you.

This is how the cycle works (and should work). The main thing here is that disposable income can be available. Without that the companies have nobody to sell to - or only a very small group which will gradually erode due to the exponential curve it creates.

Remember that when cities create incentives to house factories, it’s all about the jobs created. Because income/wages are needed for everything else to thrive. That is the reason why taxing the machine units is being raised... not as a communist folly, no, but as an integral part of the cycle of markets.

Now, despite my defense here, don’t get me wrong. I don’t believe UBI is the solution. Not if as the de facto outcome as knee jerk. A program like UBI only works is the understanding of the program is high. Yes, there will always be bottom feeders who don’t do anything, but from the other end humans are humans and the greed gene is a real one thus the capitalist cycle will only be kickstarted again. Not having to worry about monthly dues will liberate mindsets and actually stimulate (few holistic studies have all shown that a majority of participants actually get their ass off the ground).

Yet...

Economics basic math disagrees about your self-driving cab argument. Key is to tax in the sense that the math doesn’t become more expensive for the company, if the automation is taxed higher... it won’t happen and no low-level jobs will be lost. As such there will not be an increase in cost for the customer.

And thus... the world wouldn’t be more expensive. That’s the circularoity of it. Companies won’t revolutionize if it costs them more. That’s not how their fiduciary duties work either. ¯_(ツ)_/¯