NEW YORK ( TheStreet) -- Six months after resigning as chairman of American International Group ( AIG) following months of tension, Harvey Golub has come out swinging against the company's CEO and board. In an interview with Bloomberg, the 71-year-old former head of American Express ( AXP) said he believes AIG's restructuring plan is far from over. Instead of allowing AIG to continue as a multifaceted insurer -- as it currently plans to do -- Golub believes the firm should be broken into two separate entities, one offering life insurance and another offering property-casualty insurance. "When it gets broken apart, as I think ultimately it will, both of those pieces may unlock much greater value," Golub said, according to the news agency. Golub also suggested that the board is beholden to CEO Robert Benmosche, without any independence to question his decisions. "Bob has a different view of the role of the board than me," Golub said. "His was that the board should be more supportive and more agreeable, and ours was that it was an independent board to exercise oversight and not just agree." The comments should be taken in context, of course. First, Golub isn't necessarily disputing AIG's restructuring, he's suggesting that there will be more to come. ("Longer-term, AIG shouldn't exist," he told Bloomberg.) Secondly, Golub may be expressing some pent-up frustration about his departure from the board. Golub resigned from AIG in July, following a high-profile battle with Benmosche . The hard-charging CEO had given the board an ultimatum, saying he would quit if directors didn't fire Golub instead. "Bob Benmosche has informed the Board that he believes our working relationship as Chairman and CEO to be ineffective and unsustainable," Golub said in a statement at the time. "At this point, I view asking the Board to choose between us would be an abdication of my responsibility to lead. Consequently, I'm resigning for the simple reason I believe it is easier to replace a chairman than a CEO -- particularly a company in the midst of two major activities: (1) a major corporate restructuring, and (2) development of an exit plan from government control, both of which involve executing a long list of difficult tasks."