My main problem with this is that if you're poor you'll have to give up Medi-Cal (California's Medicaid program -- aka health insurance for the poor) and other state-funded benefits to be eligible.
Health care spending can and has bankrupted many people with private insurance who are very well off compared to Medi-Cal recipients, so if the poor were forced to give up Medi-Cal to get $12k of UBI per year, and then spend that money on private health insurance, and spend even more of that money on food (since they'd also have to give up food stamps), it makes absolutely no economic sense for them to do that.
As far as the poor are concerned, this is an attempt to get rid of Medi-Cal and substitute it with private health insurance, and same with the other state-funded programs that help the poor.
The way it stands now this is an awful idea, and I'd only support it if it was truly universal and did not require the poor to give up the state support they have now.
If this proposed program doesn't actually help the poor then what is the fucking point?