Milton's negative income tax is different to UBI since it's tied to productivity, UBI where its given as a safety net is NEVER going to encourage labour and productivity, I've seen it myself. Name 1 welfare program in the world that has generated more productivity from the group in question, I've yet to see one.

To rely on the deflationary nature of technology to offset that inflation in currency supply only lasts for so long because technology cannot be applied to every supply chain to drive exponential growth, the physical economy still has constraints.

So if you're flooding capital into enough people, all you do is drive more units of currency competing for a finite amount of good and services and this will be inflationary.