Londoner Leo Alexander insisted that for some under-25s, housing benefit is "a necessity".
He left home at 18 due to family breakdown and said the money he receives goes straight towards subsidising the cost of the hostel he lives in.
"It's kind of like a lifeline for a young person who leaves home with things like family breakdown or suffering domestic abuse," he said.
George Osborne today said that he would "look at housing benefits for the under-25s."
"There are plenty of people listening to this programme who can’t afford to move out of their home, but there are people on benefits who can get housing benefit under the age of 25," he told BBC Radio 4.
More top news
Father Anthony McSweeney, 68, was found guilty of sexually abusing a teenage boy at a children's home in Hounslow between 1979 and 1981.
McLaren's Fernando Alonso has released a YouTube video reassuring fans that he is well after crashing heavily in testing last weekend
The dress that has got the world on a tailspin shows us how complicated our colour perception is.