Earlier quoted context omitted.
> Generally a non-working person makes $0 Not according to Milton Friedman. https://youtu.be/xtpgkX588nM?t=191
Good source. That is of course one valid way to implement it and is essentially BI in calculation. Still even under miltons NIC, an important difference between NIC and BI is intended purpose. BI proponents want enough to live on with little hardship, NIC implies nothing in that regard and most NIC proponents I imagine would be opposed to that. I would not be a proponent of BI for that important 'scalar' reason.
Also, this framing could also make a practical difference to the interface. If the benefit is administrated separately, you don't need to think about tax until you get a job. Having to submit a tax return to get your money is potentially intimidating, not to mention somewhat degrading if it says $0. With UBI, rich and poor alike get the cheque.
>BI proponents want enough to live on with little hardship
Certainly many do, but I feel this is more of an aspiration than a requirement. I think there are huge economic benefits that will come about from the stability and freedom that even a smaller UBI provides. In the longer term, complete sustenance may become trivial.