National Australia Bank's "breakup" marketing campaign is generating an increase in new business flows, the bank said yesterday.The bank circulated data to this effect, quoted by Cameron Clyne, the bank's chief executive, at an Australia-Israel Chamber of Commerce function held in Sydney yesterday.According to NAB, in the three-and-a-half weeks since the launch of the campaign the bank experienced a 20 per cent increase in new transaction account openings; a 50 per cent increase in credit card applications; a 45 per cent increase in home loan refinancing, and a 35 per cent increase in home loan inquiries.The bank has not done much to garner additional free media following the quirky launch, which attracted plenty of social media attention at the time. Rather, NAB is now investing in conventional paid media.Speaking at the AICC, Clyne said he had received "a lot of abuse" from some people in the industry for the bank's stance in the "breakup" campaign. But he also used the speech to revisit some favourite themes."The thing that really gets on my nerves is this nonsense that NAB is destroying industry profitability. If you want to destroy industry profitability, get a government involved."Our argument is to the contrary. NAB has done more in the past two years to protect industry profitability than anybody else."Governments have blunt instruments. Some of the blunter instruments that are being used to bring about reform would do far more damage to industry profitability than the banks just competing on their own terms."One of those instruments is a policy, soon to be realised through regulation, aimed at abolishing exit fees on home loans. NAB and ANZ have voluntarily removed these fees.AAP reported that Treasury official Jim Murphy told a Senate committee hearing yesterday that one bank, which the Australian Financial Review identified as ANZ, had experienced "a significant loss of business" in home loans since the bank removed the exit fee on home loans several months ago.