yes, it's going to be funded by taxing the robots, or more likely the commercial entities that employ the robot
That's a bad idea. Corporations never actually pay taxes, they pass the cost to employees, suppliers, customers and investors, in some mix that seems good to them. What you really want to tax is the owners of the capital, the investors. Not only do they not have an easy way to shift the cost onto someone else, they also have a much more difficult time shopping tax jurisdictions to get the best deal... because that requires them to actually live in those other jurisdictions. Well, okay, so the super rich can probably skate around that a little bit by living officially in one place while actually spending their time in others, but not as easily as corporations can, and the super rich don't own the bulk of the capital. Most of it is owned by the upper middle class and lower upper class, largely in their retirement savings accounts.
Taxing people, rather than corporations, allows lawmakers to target the taxes where they want them, rather than letting the corporations figure out who to pass it to. Because at the end of the day it will always be people who pay them anyway.