Whenever you see 'promising results' about some kind of 'trial' of a more progressive policy around work or money, you should take a moment to think about whether it's actually a new finding.
The vast majority of these 'trials' are re-testing things that were already shown decades ago, we already *know* that it works, and the only reason it hasn't become policy yet is politicians and their exploitative interests. There hasn't been a genuine 'scientific debate' about it for a long time.
A good question to ask is "okay, so when will this actually be implemented?", but perhaps a better question to ask is "why isn't it already?"
(Relatedly: consider why this same standard of evidence never seems to be expected from regressive policies)