The assumption is that most basic needs will be provided by automation, not humans, hence the need for a UBI. Also, immigrants, since they don't get UBI (but hopefully get a lot of protection so as not to become a slave class).
That’s a pretty stupid assumption given how many of the jobs that support basic human needs are labor intensive (home construction, farming, medical attention, infrastructure construction for energy and water, etc, etc).
We aren’t even close to automating basic needs. We can certainly automate the manufacturing of some complex individual items though. Seems like a pretty fundamentally flawed assumption of UBI.
