>How do we feed our people currently?

Currently? Farmer farms for money, it does the thing where it goes to the store where money exchanges hands a dozen times, and then people buy the food.

>When robots come and take our jobs how does it change the fact that we can now feed people?

You're forgetting a transition between then and now specifically between now and when the unemployment so bad that it has to be recognized and the current numbers are not used with the unemployment benefit system.

It's extremely easy to hear and see stories of homeless and others going through trashcan to find food to stay alive. For homeless to die for being sick and having no money to get treatment. And so on.

Like you can pretend that things are Utopia right now and everybody is going to bed with a full belly. But in reality many aren't. To the point that some people are eating crackers just to have enough money to feed their kids something proper. And this is the USA.

So the between your Utopia where money is not really a thing and now. How do people survive and how does ubi get paid for? Robots taking over will not happen overnight. There is likely going to be many problems on the way. It could be so bad that it takes several generations before what you're talking about is realistic.