Green MP Sue Bradford is hailing Restaurant Brands' youth wage raise as "a great step forward in the campaign for wage justice and equity for young workers".

The Unite union, which represents staff at KFC, Pizza Hut and Starbucks outlets owned by Restaurant Brands, said workers had accepted an offer of a 7.9 per cent minimum wage increase at the two food outlets and a 75 cents an hour rise at Starbucks coffee outlets.