Another senior mayoral adviser, former Papakura District Council chief executive Theresa Stratton, agreed it was a good idea but "quite an expensive exercise".
She said it would be much cheaper if it were included in the first rates mailout next month.
"Is there a reason why this is not contemplated? My experience is that stuff included in the rates notice envelope is much more likely to be received than a generic flyer (even if it is addressed)," Ms Stratton said.
Ms Stratton told the Herald on Monday that she did not have any further involvement with the issue.
Mr Brown could not be reached yesterday, but Mr Roberts downplayed Ms Stratton's comments, saying she was not a communications manager but a policy analyst.
Her comments were not passed on to Mr Brown because it was an "operational matter", he said.
Mr Roberts said the flyers were part of a $516,100 five-month communications plans that included advertising and rates bill inserts to address a large number of requests for information about the new rates system through the council's call system.
Neither Mr Roberts or the council's media manager, Glyn Walters, would say how much the flyers cost or give a breakdown of the cost.
Mr Brown's biggest critic on rates, councillor Cameron Brewer, said the council had a responsibility to spell out the new rating system, but spending $200,000 on a glossy flyer was over the top.
"The suggestion of putting an explanatory notice in the first rates demand would be the more economical and sensible thing to do."