@onepict I would agree with you that a negative income tax, also known as universal basic income, would be an effective means of funding free software. It would facilitate all kinds of creativity by allowing otherwise intelligent and passionate people to fully use their skill to work on many new projects of social and scientific benefit.
The economics are solid; if more people can start businesses, GDP goes up and the size of the state as a percentage will decrease over time (i.e. lower taxes).
@onepict 40 million adults of working age in UK * £18,000 per year (elderly already get state pension):
£720 billion
Taper it, like how universal credit (welfare system in the UK) already works; as people start earning more, their UBI reduces.
Given current median wages, and expected wage growth, you could probably knock the UBI bill to ~150 billion.
Universal credit already exists; make it opt-out instead of opt-in. Auto-enroll everyone. The infrastructure for UBI already exists, in the UK.