As central banks continue to splash their cash over the system, so far to little effect, Ambrose Evans-Pritchard argues things are rapidly spiralling out of their control

Twenty billion dollars here, $20bn there, and a lush half-trillion from the European Central Bank at give-away rates for Christmas. Buckets of liquidity are being splashed over the North Atlantic banking system, so far with meagre or fleeting effects.

As the credit paralysis stretches through its fifth month, a chorus of economists has begun to warn that the world’s central banks are fighting the wrong war, and perhaps risk a policy error of epochal proportions.

In an “unforeseen and unprecedented” shift, the world food supply is dwindling rapidly and food prices are soaring to historic levels, the top food and agriculture official of the United Nations warned Monday.

The changes created “a very serious risk that fewer people will be able to get food,” particularly in the developing world, said Jacques Diouf, head of the UN Food and Agriculture Organization.

The agency’s food price index rose by more than 40 percent this year, compared with 9 percent the year before - a rate that was already unacceptable, he said. New figures show that the total cost of foodstuffs imported by the neediest countries rose 25 percent, to $107 million, in the last year.

The superrich are gobbling up an ever larger piece of the economic pie, and the poor are seeing their share of earnings shrink: new IRS data shows the top 1 percent of Americans are claiming a larger share of national income than at any time since before the Great Depression.

The top percentile of wealthy Americans earned 21.2 percent of all income in 2005, up from 19 percent in 2004, according to new Internal Revenue Service data published in the Wall Street Journal Friday.

Finance ministers and central bankers have long fretted that at some point, the rest of the world would lose its willingness to finance the United States’ proclivity to consume far more than it produces - and that a potentially disastrous free-fall in the dollar’s value would result.

But for longer than most economists would have been willing to predict a decade ago, the world has been a willing partner in American excess - until a new and home-grown financial crisis this summer rattled confidence in the country, the world’s largest economy.

The US government is on a ‘burning platform’ of unsustainable policies and practices with fiscal deficits, chronic healthcare underfunding, immigration and overseas military commitments threatening a crisis if action is not taken soon, the country’s top government inspector has warned.

Drawing parallels with the end of the Roman empire, Mr Walker warned there were “striking similarities” between America’s current situation and the factors that brought down Rome, including “declining moral values and political civility at home, an over-confident and over-extended military in foreign lands and fiscal irresponsibility by the central government”.