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 spe…
So then they wouldn't do that. It says you can't get the UBI if you get Medi-Cal, it doesn't say you can't decline the UBI and continue to get Medi-Cal, right?
The entire point of a UBI is that it replaces all of these hacked together assistance programs with something with less overhead (no eligibility testing bureaucracy) and less economic distortion (giving restaurant workers food assistance when they already have access to food and could better use the money for transportation or education etc.)
If you like Medi-Cal, propose it as a "public option" -- instead of getting it if you're poor, you get it if you pay $6000/year or whatever it actually costs the state. Then people can take their $12,000 UBI, use $6000 to buy Medi-Cal and have $6000 left over. But then it lets people to choose not to, e.g. because their spouse's employer-subsidized private insurance would cover them for an additional $4000/year and they'd rather come out ahead by $2000.
Having both is silly because it doesn't get rid of that inefficiency. If you instead wanted people to have a $12,000 UBI and $6000 in medical coverage then just give them $18,000 and let them decide whether they want to buy $6000 in medical coverage or something else. You can debate the amount of assistance but it still makes no sense to force people to buy specific things.