That appeared to be the case when Russel Norman and Don Brash appeared on The AM Show panel on Tuesday morning.
The question was raised by Sir Branson over the weekend when he told people at a charity fundraiser that cannabis could be a business opportunity for New Zealand.
"You should legalise it, grow it, tax it, regulate it," he told Newshub.
"I think that would be wonderful, because obviously the amount of dairy cows that New Zealand has is damaging the rivers. If you could put some of that land over into growing cannabis, it would be just as profitable for them, if not more profitable."
Greenpeace NZ executive director Russel Norman said it would be a sensible move.
"There's too many cows in New Zealand. It's having a dramatic impact in terms of our waterways.
"Obviously cannabis is an alternative crop, but whatever. I mean, I'm not particularly fixed on that. It's more a matter of saying there's just too many cows."
Mr Brash said he's "not sure" how real environmental concerns around cows are, but he accepts "there is a problem to be dealt with there."
He said New Zealand needs to face the issue of cannabis and if he was Prime Minister, he would decriminalise it. That came with one caveat - limited access for young adults.
"I would work very hard indeed to prevent the use of cannabis by teenagers. I think the evidence that it actually does reduce incentives [and] demotivate people is fairly compelling", he said.
The decriminalisation of cannabis wasn't the only thing Mr Brash and Mr Norman agreed on. They both also thought the government shouldn't contribute toward the cost of Joseph Parker's boxing title defence.