Corpos are, almost to a man, adherents to the church of *self preservation*. They have something to lose and they don't want to lose it. Thus the benefit of corporations: *stability*. What does an individual already on top want more than almost everything else? To stay there. Something something first rule of power.
While that's certainly true in RL, the corporations in Cyberpunk are notably ideologically driven with Arasaka being about expanding a Neo-Imperial Japanese supremacy while Militech is a jingoistic tool of a dead America.