Foster families who have experienced problems arising from foster children leaving home too soon have told ITV News the law must change.
Currently children as young as 16 in foster homes are being told they have to leave and live an independent life - but charities say that can have a devastating effect.
The Welsh Government says it is already working on a pilot scheme, 'When I Am Ready', to enable young people to remain with their former foster carers beyond the age of 18.
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Lorraine Twinney from Cardiff was made redundant a year ago and has to live off just £25 a week to pay for her bills and buy food.
As many as 1 in 4 people are now living in poverty in Wales, and figures show average earnings are £50 a week lower than the rest of the UK.
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