I’ve been talking about the Negative Income Tax lately, and equating it with the idea of a Basic Income. I think most of the policies’ respective advocates would deny that they’re the same policy. In this post I’m going to outline why that’s incorrect and I’m happy to say that they’re basically the same thing. For the uninitiated, a Negative Income Tax is a form of welfare that replaces most existing welfare schemes with a single payment that supplements the income of the unemployed and low-paid. The payment is withdrawn as your earnings increase, ideally at a gradual enough rate that increasing your earnings (and hence reducing leisure time) is always worthwhile.

An example: a £5,000 basic payment at a 50% marginal withdrawal rate (this means that for every additional pound earned, the worker will receive 50p less in NIT payments). Someone with an income of zero would receive an NIT payment of £5,000, or just under £100/week. If they took a job that paid £5,000/year, they would receive a top-up of £2,500/year; that paid £7,500, a top-up of £1,250/year. Once they reached £10,000/year, they would receive nothing in NIT.

This idea was supported by Milton Friedman, among others, and has a reasonably strong pedigree on the right. Even libertarians who object to income redistribution in principle usually concede that a Negative Income Tax is the least bad form of welfare, because it is administratively simple and perverts incentives less than most welfare schemes. It is particularly appealing to many liberals and libertarians because it is unpaternalistic.

A Basic Income, on the other hand, is usually conceived as a flat payment to everybody irrespective of circumstance. This leads to a very big problem: assuming it replaces most forms of welfare as an NIT does, a basic income high enough for unemployed workers to subsist on would simply not be affordable to pay to everyone. A policy that ideally would be designed to help the poor ends up being a very expensive subsidy to people who do not need extra money.

Advocates of the Basic Income recognize this, and their solution is typically to use the tax system to ‘claw back’ the payment from relatively high earners. So everyone gets the money, but it is withdrawn according to earnings.

In practice, that’s more or less the same as a Negative Income Tax – the only difference is whether the withdrawal takes place at the ‘front’ of the payment (as with the NIT), or the ‘end’ (as with the Basic Income). Strange as it may seem, the policies advocated by Milton Friedman and the Green Party are the same in all but the technical detail.

But even if there is a surprising amount of agreement in terms of the kind of welfare we’d like to see, the detail may be more difficult to agree on. How much should a ‘basic income’ be? When should it begin to be withdrawn, and at what rate?

Questions like this are, I think, likely to be where what breaks up this (unholy?) alliance. But maybe not. Traditional policies like the minimum wage probably do more harm than good, and, rightfully, the question of how to improve the lives of the low paid does not seem to be going away. It will take compromise, but in the Negative Income Tax / Basic Income, we may have an answer.