Young adults who have been unemployed for a year would be guaranteed a job for six months by a Labour government under plans to be set out today by Ed Miliband.
They would be provided paid work for 25 hours a week and training by their employer for a further 10 hours a week, but face tough benefit sanctions if they drop out of the scheme.
Launching the initiative, Mr Miliband will draw on his father's personal experience of arriving as a refugee from Nazi Germany.
"He succeeded because he was given a chance – and the opportunity was matched by his sense of striving," the Labour leader will say.
The £600m-a-year scheme would, based on current figures, help about 110,000 people aged 18 to 24 every year. It would be funded from taxing bankers' bonuses.
Mr Miliband, speaking at a Labour youth conference, will make it a central ambition of an incoming Labour administration to "conquer" youth unemployment.
He will accuse the Government of failing to get to grips with lengthening dole queues among the young.