Purple reign: Should the blue and red parties combine for an unstoppable coalition?

There's criticism that the tails are wagging the big dog in the coalition Government. And, with $1.2 billion wasted on Three Waters, and an influx of other infrastructure issues in the Government in-box, is it time to consider a different way of doing things? Could a grand coalition between National and Labour pave the way for better planning and stop smaller parties wielding disproportionate power? We learn the lessons of history from an international expert and see if ex-ministers from the big two can find (more) common ground. Plus, the brilliant Andrea Vance literally goes to the end of the earth for a very special report.