If it's reasonable to view is as akin to universal basic income, there certainly have been many “experiments"
This discusses studies to 2020:
https://www.vox.com/future-perfect/2020/2/19/21112570/universal-basic-income-ubi-map
There have been several others I'm aware of in the US at least, and all seem to have had positive results, e.g.
https://www.npr.org/2021/03/04/973653719/california-program-giving-500-no-strings-attached-stipends-pays-off-study-finds
https://www.npr.org/2024/03/05/1233440910/cash-aid-guaranteed-basic-income-social-safety-net-poverty
'Researchers also reject the stigma that poor people can't be trusted with free money.
"They spend the money in ways that everyone does,”’