> The fundamental issue with a basic income, as I see it, is that it's impossible to guarantee, since the revenue, out of which basic income is paid, comes from taxes. This makes it impossible to know how much money the government will have to pay out a basic income next year. So a family that has gotten used to, say, $15,000 in basic income one year, may only get half of that the next year, because government can't predict its tax income for the next year.

This is only a problem for a government constrained to short-term budget balance (U.S. states largely are for their operating budgets, but the federal government is not.)