I have dealt with unemployment in the Great recession and know how nice that would be but the logistics of it are unfortunately very non-trivial, essentially in having everything already broken down to specified commoditized tasks. Annoyingly much of the work is "contextual" and would take far more effort to specify correctly to arbitrary outsiders and that is before work standards and cost of verification. Which would drive down wages of commoditized and halfway "automated" tasks further.

Ironically the best examples that come to mind are Uber and some other start ups which manage to both pay terribly and be hardly viable businesses.

UBW would probably work best in a productive sense in a massive stack of prespecified mini-jobs that could be done without supervision like "mow this section's grass, paint this fence".