A UBI would be funded by progressive taxes – most proposals prove that it is normal means.
Büchs, 2021 - Sustainability Research Institute at the University of Leeds [Milena, Ecological Economics, November “Sustainable welfare: How do universal basic income and universal basic services compare?” https://www.sciencedirect.com/science/article/pii/S092180092100210X Acc 3/30/23 TA]
Most proposals emphasise that UBI would need to be financed by replacing existing income support schemes and through progressive taxes. In this paper, I assume a progressive system of financing UBI which would result in a net redistribution from richer to poorer people. An analysis of the financial viability of UBI (and UBS) goes beyond the scope of the paper. Financial viability will critically depend on societies' willingness to redistribute and target resources towards UBI and UBS schemes which could become fundamental for establishing sustainable welfare systems.