[bhupy]

Well first of all, the point is to show that there is never a dis-incentive to earn more, which is how progressive tax brackets are supposed to work. You will always earn more money the higher up the income distribution you go, you will just earn less money net-net than you do today.

Second of all, what I described is the absolute worst case increase in income tax because it assumes:

1) 0 overlap with existing programs, which is extraordinarily unlikely. A transfer of $29,000 to a recipient of EITC/CTC and Medicaid is a pretty stupid waste of money. We would either reduce the UBI required (thereby reducing the taxes to the level I laid out in my top-most comment), or we would do away with many of the welfare programs that we already pay taxes for.

2) 0 other taxes. My math assumes an imaginary world in which we do not levy payroll taxes, which account for 35% of the current Federal revenue. That is a world which does not exist, and hence the income tax wouldn't have to be this high.

[elindbe2]

But you're not including any other taxes required to run the federal government and you're also handwaving away the effects of a 97% tax rate. Tax rates would have to increase even more just to counteract the fall in government revenues from enacting such high tax rates as every high earner starts figuring out how to structure their income to avoid such taxes or just gives up earning extra income altogether.

Imagine what a 97% tax rate would mean in practice. In order to earn $30 for an hour of your time you now need to charge your customer $1000. As far as I'm concerned 97% is close enough to 100% as to be almost indistinguishable in terms of the economic outcomes.

[bhupy]

> But you're not including any other taxes required to run the federal government

I'm also not including any other non-income sources of taxes that are already levied. I'm also assuming that there is 0 overlap between a UBI and existing taxes required to run the federal government. Both of those are false.

> you're also handwaving away the effects of a 97% tax rate. Tax rates would have to increase even more just to counteract the fall in government revenues from enacting such high tax rates as every high earner starts figuring out how to structure their income to avoid such taxes or just gives up earning extra income altogether.

> Imagine what a 97% tax rate would mean in practice. Someone offers you $100 to do a half an hour of work. Now you're now making $3 for your efforts. In order to earn $30 for an hour of your time you now need to charge your customer $1000.

There's no hand-waving, this kind of marginal tax rate is not unprecedented. Post-WW2, the marginal tax rate was 90%. As long as the progressive tax brackets maintain an increase in net income, we at least wouldn't have a disincentive to work more, which is an important characteristic to maintain. If you think 97% is too high of a marginal tax rate, you can make the income tax more flat (more akin to EU states today), and achieve similar outcomes.

And again, this is the worst case, because it assumes that there is 0 revenue from other existing sources (which I did not include), and that we would somehow have a generous Medicaid, Medicare, EITC, CTC, Food Stamps, SNAP, and Social Security on top of a UBI, which doesn't make sense. And also assumes that the UBI indiscriminately applies to everyone, including children. A $29,000 per person UBI would mean that a family of 4 would receive $116,000, which is an unreasonably generous UBI.

I've taken a preposterously generous system with a singular source of tax revenue, and shown that you would get to levels of income taxation that existed post-WW2 to fund that.