There is concern about the RNZ-TVNZ merger's effect on broadcasters.

Prime Minister Jacinda Ardern has said RNZ will collapse without the merger.

Media commentator and former TVNZ news head Bill Ralston says he's concerned about how much oversight ministers will have over the board.

Bill Ralston says that what happens to RNZ is up to the Prime Minister because it's directly funded by the Government.

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