It's unclear that a basic income guarantee is the best use of society's redistributive capacity.

"...In other words, the possible work-disincentive effects of a BIG are important, not only for determining the maximum BIG a society can sustain over time, but also because they underscore the fact that a society’s ability to redistribute income may have economic as well as political limits. Funding a social welfare benefit as costly as a UBI (or an equivalent NIT) could impose significant opportunity costs on society – preventing it from funding other equally or more important social welfare benefits."