In response to Finland considering giving 800 euros to each citizen per month;
If the argument is that it can be controlled based on tax receipts, as luxfelix mentioned here previously, it would be given back to you. The Atlantic's "The Conservative Case for a Guaranteed Basic Income", points to Hayek, Friedman, and many others taking such an approach. Returns and an oversite program would be null and void, as it would then be unnecessary to take the money in the first place. As Mccartney said, "Let it be."; laissez faire.
I have no argument for the effect on the incentive to work being positive. I can see a few angles, such as the stability of regular money would inspire a certain person towards success. But, I am totally speculating based on my own position of wanting to create value and acquire skill and experience.
I won't venture any further down that road, but I would appreciate anyone's thoughts with relevant data. It seems patchy at best in regards to Dauphin, Manitoba & Madhya Pradesh, India &,& Cherokee, North Carolina.
Several attempts to do this are coming in Utrecht, Switzerland, and elsewhere.
Why is this important to me? The mechanics of it are interesting. A pay in system could be adapted as a DRO. I am planning for a DRO type startup, though not for this function.