William Hague, the former leader of the UK Conservative Party, has warned the policies of central banks are pumping up stock markets and house prices, threatening an "almighty crash".
In a column for the UK's Telegraph Hague said the accumulating effects of loose monetary policy globally was intensely political.
"When pension funds renege on promises, or inequality widens further, or savers become desperate, huge public and political anger is going to burst over the heads of the world's central banks," he wrote.
"The only way out is for the US Fed to summon the courage to lead the way to higher interest rates, and others to follow slowly but surely. If they fail to do so, the era of their much-vaunted independence will come, possibly quite dramatically, to its end."
In 2008 central banks had reacted to crisis by cutting rates to record lows and embarking on quantitative easing, pumping trillions of dollars into their economies, Hague wrote in his column in the Telegraph.