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There's a kind of income tax that works in reverse.
For those who earn below a certain amount — like the poverty line — the government pays them. The US already has a program like this that benefits millions, and President Donald Trump has proposed expanding it.
The idea is called a Negative Income Tax (NIT) and versions have helped fight poverty and improve health.
Business leaders such as JPMorganChase CEO Jamie Dimon believe it could be an answer as more jobs become automated by technology.
How it's applied today
The largest example of NIT is the Earned Income Tax Credit (EITC), which serves 27 million working families in the US. It was started in 1975, under President Gerald Ford, expanded once by President Reagan, and expanded further by President Clinton.
The EITC functions like a big tax refund. If a family makes below a certain amount each year, the government will refund the tax that was withheld plus an additional amount.
President Trump wants to increase the EITC for couples making under $64,400 a year (or individuals earning below $31,200) to help low-income parents spend on childcare, up to a certain point. Families will also be able to deposit some of that money into a special account, which the government will match up to $1,000 annually.
(Kevin Lamarque/Reuters)
But it's still important for government "to have eggs in other baskets" when solving poverty, rather than relying exclusively on the EITC, says Russ Whitehurst, senior fellow of economics studies at the Brookings Institution.
"Education programs that increase skill levels among the working-age population have, to date in human history, paid a consistent dividend in the form of higher overall economic activity," Whitehurst tells Business Insider.
A hypothetical NIT, courtesy of the 1960s
Milton Friedman, the influential University of Chicago economist, started talking about NIT in 1968. He saw it as a way to help people economically without reducing their incentive to work.
He proposed a hypothetical. Let's say the lowest income someone could pay tax on was $3,000. For everyone who makes below that, Friedman said the government should give them 50% of the amount between the actual income and the cutoff. So if you earned $2,000, you'd get half of the $1,000 difference, or $500. If you earned nothing that year, you'd get $1,500.
In other words, a family could never earn less than half the threshold, but it also couldn't earn the threshold itself or higher. Friedman said this was essential, because if people could earn the baseline or higher, they'd have little incentive to work at all.