Thanks for the relevant blog post link. My gut feel is that 6% wealth tax destroys retirement savings and that anything over about 2% in fact does so. (I'm planning on a 3.5% withdrawal rate in retirement, so a 2% additional wealth tax increases by >50% the amount of money I need to squirrel away for retirement. $24K in UBI replaces $685K of that savings need, though almost surely brings along inflation with it and I'm projecting to need a substantial multiple of $1MM to retire.)

I also think that UBI in its first version needs to be more like $600/mo/adult. It's going to be austere for sure, but a figure much higher is not supportable (and so DoA when proposed).