Trickle-down economics is given another go in the US

By cutting taxes for corporations and the wealthy, it encourages them to hire and invest, causing funds to then trickle down and raise incomes of ordinary citizens by $4,000 a year

House Republicans passed their version of legislation to overhaul the US tax code on Thursday by slashing the corporate tax rate, lowering tax burdens for most individuals and adding an estimated $1.4Show more

Does money roll downhill? In their drive to cut taxes, President Donald Trump and congressional Republicans are betting it does.

Behind their legislation is a theory long popular among conservatives: slash taxes for corporations and rich people, who will then hire, invest and profit - and cause money to trickle into the pockets of ordinary Americans. The White House says the plan's corporate tax cut alone would eventually raise average household incomes by $4,000 a year.

The tax plan's "trickle-down" approach was popularised in the 1980s during the Reagan administration, though it dates back at least to a 1932 wisecrack by Will Rogers. And history shows it has a spotty record of delivering on its promises.

The Republicans' latest version of the approach edged closer to the finish line on Thursday when the House passed its form of the bill; the Senate is working on its own. Republicans hope to send final legislation to Mr Trump by Christmas, though it's unclear whether they can succeed by then.

Among the key planks in their legislation: shrink the corporate tax rate to 20 per cent from 35 per cent; end or ease the inheritance tax on the wealthiest estates; cut taxes on business partnerships; offer a temporary tax cut on corporate profits held abroad; repeal the alternative minimum tax on very high earners and reduce personal income tax rates for many.

The non-partisan Tax Policy Center has found that the House tax plan would deliver an average tax cut of $360 for middle-income taxpayers in 2027. A far more generous bounty would go to the highest-earning 1 per cent: An average tax cut of $62,000. For the top 0.1 per cent, the gain would average $321,000.

And the income tax cuts for individuals would expire within the next decade. By contrast, Republican lawmakers say the tax cuts for corporations need to be permanent. The tax cuts would also add roughly $1.5 trillion to the federal debt.

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Republicans argue that the corporate tax cuts, in particular, would unleash a boom that would speed annual economic growth to at least 3 per cent consistently from the so-so 2 per cent performance of recent years.

The thinking is that reducing corporate taxes would raise companies' after-tax profits, thereby encouraging them to invest more. Investments in machines and technology would make employees more productive and empower them to command higher pay. The White House's own study estimates that the corporate tax cut would eventually swell average US household income by $4,000 a year.

"It will increase real wages, and it will increase them substantially," says Arthur Laffer, an economist who advised President Ronald Reagan and now runs a consultancy. "It also will increase the number who get jobs."

Mr Laffer occupies a position of prominence in the history of trickle-down economics. In 1974, he famously sketched a diagram on a restaurant napkin to illustrate his belief that the government could cut taxes and, contrary to economic assumptions, end up producing more revenue, not less. Economic growth would accelerate, and income would slosh downhill from corporations and the wealthy to ordinary Americans.

Over the years, the concept - also known as supply-side economics - has frequently drawn ridicule.

"Voodoo economics" was the derisive term George H.W. Bush applied to it in his failed 1980 bid for the Republican presidential nomination against Ronald Reagan, a supply-side enthusiast.

The liberal economist John Kenneth Galbraith in 1982 likened the trickle-down idea to horse manure: "If you feed the horse enough oats, some will pass through to the road for the sparrows."

Will Rogers may deserve credit for coining the term in ridiculing President Herbert Hoover's efforts to combat the Great Depression.

"The money was all appropriated for the top in the hopes that it would trickle down to the needy," Mr Rogers wrote in his syndicated column in 1932. In fact, Mr Rogers argued, money tends to trickle up - from the hands of the poor into the hands of the rich.

In the view of Carl Davis, research director at the left-leaning Institute on Taxation and Economic Policy, the track record for supply-side economics "is not particularly inspiring".

In 1981, in the midst of a deep recession, President Reagan pushed through an aggressive tax cut. The economy did rebound strongly over the next few year. But economists have long given credit mainly to the Federal Reserve, which aggressively slashed interest rates.

Bruce Bartlett, a former aide to tax-cut advocate Rep. Jack Kemp, says the 1981 tax cut made sense: the top individual tax rate was 70 per cent - far above the current 39.6 per cent - and the economy, unlike the relatively healthy one today, had endured a long era of stagnation.

But Mr Bartlett, an official in the Reagan and George H.W. Bush administrations, has lost faith in tax cuts. In 1986, he notes, the US slashed the corporate tax rate from 46 per cent to 34 per cent. Yet wages fell. Likewise, President George W. Bush's tax cuts in 2001 and 2003 produced one of the weakest economic expansions in American history: the Bush tax cuts were still in place when the economy sank into the Great Recession of 2007-2009.

Owen Zidar, an economist at the University of Chicago's outlook for Booth School of Business, says his own research suggests that tax cuts are more effective when they target lower-income taxpayers, who are likelier than the rich to spend a tax-cut windfall.

In addition, Mr Bartlett and other critics say, now is an especially inauspicious time for sharp tax cuts. The economy is enjoying the third-longest economic expansion on record and doesn't need much help. Unemployment, at 4.1 per cent, is extremely low, and many employers are already struggling to fill job openings. In a healthy economy, sharp tax cuts can also raise the risk of high inflation.

What's more, corporations are recording healthy profits, enjoying low borrowing rates and sitting on a record $2.3 trillion in cash. If they want to make investments, most already can.