FWIW I'm far left and in favor of UBI, but one thing to keep in mind is that while it's a simple concept, details (i.e. amounts paid and amounts taxed) matter a lot. There's no reason why UBI can't be redistributive if one desires it to be so - you just use more progressive taxes to fund it.
And, of course, reducing the complexity and cost of welfare ought to be a left wing talking point as well! Again, it depends on what you do with the savings - sure, it can just be taken and used elsewhere, or you could maintain the spending but raise the bar on how much UBI provides.
And, of course, reducing the complexity and cost of welfare ought to be a left wing talking point as well! Again, it depends on what you do with the savings - sure, it can just be taken and used elsewhere, or you could maintain the spending but raise the bar on how much UBI provides.