One of the reasons why so much of his company was controlled by his family. He owned 20% of the company's shares. His various family members probably owned shares as well. Add to that the fact that, until the 4th Corporate War, Saburo was making everyone investing in Arasaka very wealthy... there was just no one to oppose him.While I've always understood Saburo's delusions of grandeur I've never been able to wrap my head around his otherwise rational actions. I'm no psychologist but it seems to me the two would come into conflict and some of his actions would raise red flags in his business partners and make it impossible for him to be as successful as he was for as long as he was.