Bridges told Mackay he believed the Government has since started to talk more about the CGT, but mainly to defend it.
Listen below:
"Michael Cullen now is acting much more like a Labour Party politician than a tax working group expert and he's out there defending it, and even Grant Robertson sort of is."
"So I think they're backing away from not saying anything, [and] they're trying to defend it."
Bridges said he is prepared to fight the Government on the CGT "because it's so wrong," especially towards young people and small businesses.
"We all agree we need a more productive innovative economy. Why would you get in the way [of] that with a third tax on the gain of a small business ... it just doesn't make any sense."
"It's just about killing the incentive to get ahead."
Also in today's interview: Bridges talks about whether once being labelled the 'new Winston Peters' is now a compliment or an insult.