So I'm going to start by talking about the numbers of a guaranteed basic income (GBI), mostly because they work out to appeal to self-interest.
First, my estimate of the cost of the GBI is around $3T/year, and I get there by taking 240M adults and multiplying by the individual $12k/year amount needing to exceed the poverty line. Other estimates I have seen are in the 2 ~ 2.5T range, based on estimating at a household level, but I'll use mine because it's more pessimistic.
Next is how to pay for 3T/year in expenditures. First, some sacred cows need to burn:
- Social Security - the idea was to give a safety net for the old and disabled, GBI is THE safety net, this money goes to that entirely. 1T/year [1]
- Welfare/Housing/Food Stamps - Like above, the GBI is the safety net, these are unneeded, estimated federal, state, local .5T/year [1]
- Unemployment benefits - I haven't found good data on this except a quick note from the CBO giving an estimate of around 100B in fed spending. States bear a lot of this cost, so I'm going to estimate this at .25T/year
- Medicare - the ACA requires everyone to get private health insurance, and the government should get out. This should be replaced by a program to subsidize premiums for those with demonstrable need. Currently this is at 1T/year[1], I think the replacement would save .75T/year
So from spending cuts alone we get 2/3 of the funding (and if we go with more optimistic estimates, we've paid for it). Leaving only 1T/year to come up with. So far we haven't touched taxes, so everyone is still earning the same income they already have plus receiving their GBI check for an extra 12000/year. If we raise taxes to put some of that back in, say such that the top 60% of earners put back an average of 8000/year, we get .96T/year in increased taxes. The rest I suggest come from a serious overhaul of capital gains taxes and especially inheritance taxes to close loopholes and reduce the level of trust-fund legacy at the top, and it's a small enough amount to not require particularly large changes.
So as it stands, every adult in the US would get $12k/year, even with an increase in taxes those currently earning good incomes would receive an average of $4K/year extra.
Now for the non-economic reasons. First I tend towards a libertarian view, people should be free to live their lives as they find best and not prodded and pushed by the government to live a certain way (which I see the current social services doing be enforcing spending on specific line items in specific ways.) However, I am not inhumane, I have no desire to Dickens-style impoverishment and suffering in my fellow humans. Further I think that ensuring a basic level of life for everyone is an incredible achievement as nation, and broader as a species, provided it is done in a way that ensures the dignity of the individual (which I feel the GBI does.)
Second, the social benefits, given that crime levels are highly correlated with poverty, I suggest that crime will decrease. On that same line, our costs for running the prison system decrease - when a person is incarcerated their GBI payment is routed to the prison which should offset a good portion of the cost.
I further see this as encouraging people to explore creative and entrepreneurial options - if a person need not fear homelessness and starvation because their band doesn't work out they're more likely to take a shot at it. If a person doesn't need to work 50 hours a week at two minimum wage jobs to pay the bills they have a lot more time to consider writing a book, or painting, or starting a restaurant. I am quite willing to accept that there will always be some part of society that is just lazy - Jesus said "the poor you will always have with you" well I'll paraphrase that as "the lazy you will always have with you."
So, I think it's feasible, and that even those making good income today would get more money from it, and that it will greatly improve how we deal with the issue of a social safety net.
[1]
usgovernmentspending.com