Skip to content

Does Guaranteeing a Basic Income Reduce Income Inequality?

Scott Santens
Scott Santens
5 min read

Universal Basic Income (UBI) directly reduces income inequality.

I've actually written an as yet unpublished chapter for a book about this very topic, and am working on an article about this as well.

Here are two preliminary findings from what I'm still working on:

(For a quick primer on the Gini index, how it's calculated, and why different sources conclude different numbers, read this. In short, a Gini of 0 represents maximum equality and a Gini of 1 represents maximum inequality.)

  1. My own calculation of the current Gini of the US distribution of income before taxes, using data from 2010 from all filing categories:  Gini = 0.60
Gini Now
  1. This is the theoretical US Gini after applying a 40% flat tax to the same before tax distribution and providing a $12k/4k basic income ($12,000 for adults and $4,000 per child): Gini = 0.46
Gini UBI

That's a reduction of the Gini by 0.14.

According to the CBO, our current pre-tax Gini is 0.47 and post-tax Gini is 0.43. So a basic income flat tax would be an improvement of 0.10, potentially lowering our Gini to 0.33. That's enough to give us an after-tax Gini index on par with the Nordic states, and lower than even our record low in 1968.

Bonus trivia: Economically optimal Gini is considered to be in the range between 0.28 and 0.38. Anything higher than 0.45 is considered a drag on the economy, and thus harmful to GDP, as well as society itself.

####Translation: Without taxes and transfers we'd have been screwing ourselves every year since 1995.

History of US Gini index

(Note: Again, different sources claim different Gini coefficients. According to the OECD, the US had a pre and post tax Gini in 2010 of 0.50 and 0.38. So it's likely the OECD would calculate a different UBI-FIT Gini, but they don't share their method, so it's difficult to guess their guess. It would certainly however be lower than 0.38.)

If you're not sure how this works, imagine yourself and four friends with the following amounts of money in your wallets: $6, $18, $30, $46, $100.

Gini index of you and your friends = 0.43


Now imagine you realize the two with the least don't have enough for all of you to go out and enjoy some drinks together. Your friend with $100 could just buy their drinks, but he knows people feel better about themselves buying their own drinks, and feels they are starting to resent him for always having so much more than them, and always buying their drinks. So he tries something new.

Your rich friend suggests that everyone put 40% of their money into a pot, which will then be divided equally amongst all five. The result after doing so is that now the wallets contain: $19, $27, $34, $45, $76.

New Gini index of you and your friends = 0.26


Now your two poorest friends have enough for a few drinks, and you can all go out, but this time everyone feels independent, with no one being a charity case. Your richest friend just enabled everyone to go out and have a good time, instead of leaving two friends out or straight paying for their drinks for them.

The amounts in each wallet reflect the actual income distribution by quintile in the US in 2010.

Income distribution by quintile

The amounts in each wallet after each throws the same percentage into a pot and splits it is the actual distribution after a 40% basic income flat tax.


A flat tax funded basic income directly reduces income inequality by taxing those at the top more and transferring this income as extra income for those at the bottom and middle.

The pivot point of this modification rests at around the 60-80% point, meaning that about 60% of individuals and 80% of households would have more income after taxes than right now.

(Note: I use a flat tax because it is much easier to understand and much easier to model. But other methods of funding a UBI would still reduce income inequality, and even wealth inequality if wealth is taxed, because all forms of UBI function as the means of getting money from the top, and transferring it back down to the bottom and middle where the money came from in the first place.)

Science: capitalism is a system that is always transferring money to the top from the bottom

Oh no, some might say. That's communism. We can't have everyone entirely equal. We can't take everything from the rich and give all their money to the poor.

Look at this chart, then express those concerns again...

Chart of US income distribution: before taxes now vs. after taxes now vs. after basic income flax tax TOMORROW

Basically, a basic income would give us an income distribution more like the wealth distribution people already think we have, but are entirely mistaken in thinking...

Silvrback blog image

... And would be a BIG step closer to what 92% of Americans consider our ideal wealth distribution should be.

Silvrback blog image

(Note: Wealth inequality is far more extreme than income inequality, so when we compare ideals, we want income inequality to be even LESS than the above ideal image.)

It is imperative we understand just how extreme inequality has gotten here in America. Only then will we start enacting real changes to the system - like basic income - to do something about it.

Silvrback blog image

Silvrback blog image sb_float

Like my blog? Please subscribe and also consider making a monthly pledge of support.

######Want to crowdfund a basic income? Take The BIG Patreon Creator Pledge.

Subscribe to my blog | Follow me on Twitter | Like me on Facebook | Follow me on Tumblr

Scott Santens Twitter

Unconditional/Universal Basic Income (UBI) advocate with a crowdfunded basic income; Founder and President of ITSA Foundation, Author of Let There Be Money; Editor of