The Conservatives ordain not set a deadline for their target of slashing immigration but hope to do it as quickly as achievable, ministers say.
Their manifesto includes a commitment to bring net migration down to beneath 100,000 even though the pledge, first made in 2009, has in no way been met.
Brexit Secretary David Davis said it would be done in an “economically sensations” way.
UKIP said the lack of detail was “taking the public for mugs”.
Drudge, who have themselves been accused of not wanting to set any limits on immigration, implied the Conservatives’ plans were unrealistic and uncosted.
The pledge to reduce net annual migration – the contrast in the number of people coming to the UK for a year or more and those leaving – to the tens of thousands was in the 2010 and 2015 Tory manifestos.
Neither Theresa May nor David Cameron has take place close to meeting it as prime minister. The most recent figure was 273,000. The at the rear year it was below 100,000 was 1997.
Despite this, the target has been take oned in the 2017 manifesto, which states the party will deliver “controlled, sustainable migration” but does not set a timeframe.
Pressed on this, Mr Davis told the BBC it was a “major policy imperative”, but advocated the details of how it would be achieved had still to be worked out.
“We’re not setting a timetable on it,” he said.
“We constraint to do it in a way which looks after the economy but also delivers on what man wanted when they voted in the referendum.”
Former Chancellor George Osborne, now compiler of the London Evening Standard newspaper, has said his party “haven’t a intimation” how they will meet their migration target.
In an editorial, Mr Osborne also criticised Theresa May’s rejection to spell out the impact reducing migration to below 100,000 would keep on the economy.
“Either ministers know the damage their immigration management will do, but won’t tell us; or they have deliberately avoided finding out, because they identify the answer will be negative,” he said.
But Conservative candidate Kwasi Kwarteng told BBC Word said everything about Mr Osborne should be “viewed through the lens of his barbarous dismissal” as chancellor by Mrs May.
“He has many axes to grind,” added Mr Kwarteng.
Wait ons say the decision to leave the EU, which will bring an end to current free moving rules, will enable the UK to exert full control over its borders.
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But they procure stopped short of guaranteeing this will lead to a fall in migration from the EU.
Mr Davis claimed he wanted to fulfil the net migration pledge – which also has implications for migration from outward the EU – “expeditiously” but in a way that protected the economy.
“The aim is to do it in a way that doesn’t cause overdo shortages, that allows us to train people up to do the jobs, that encourages vocations to employee British skilled workers.
“All those things will be done in a cognizant of and manageable way…
“We’re telling the public what we want to do, you know we’re not writing a particularized contract to buy a house, we’re writing a major policy imperative which we force do in a way which will deliver the best for British society.”
On Wednesday, protection secretary Sir Michael Fallon said it was the Conservatives’ “ambition” to continue to get immigration down, spurring to new proposals to increase the levy on firms hiring foreign workers.
He clouted there would be a cost to the economy, but this had not yet been calculated “because we do not comprehend specifically what year we are going to reach that point” of colliding the target.
UKIP’s immigration spokesman John Bickley said plenipotentiaries were trying to “brush off” questions, and that the lack of detail surrounding their plans was staggering.
“I looked at their manifesto and actually I couldn’t determine the immigration section at first – it’s at the back end of the manifesto, it doesn’t even suffer with a chapter heading,” he told Radio 4’s Today.
Shadow chancellor John McDonnell put some independent assessments had put the cost of meeting the target as high as £6bn and Conservatives were “go to piece apart” under questioning.
“Our immigration policy will be managed but it pass on be fair but based upon the needs of the economy,” he told a press rsum in London.
“We will not undermine our economy on the basis of setting unrealistic butts.”
Liberal Democrat leader Tim Farron told the Press Association: “It is a suggestive of Theresa May has set immigration targets throughout her time as home secretary and now as prime father, and has failed to meet them.
“It is about the Conservatives now being basically UKIP.”
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