New developments and new approaches had permitted a new corporation to build a new bridge at a lower cost–and to make it free within a few years of its opening, while still turning a profit for its investors. But in doing so, the profit-making potential of the old bridge was destroyed (although investors had already made back their initial investment multiple times over).
But hadn’t the old company taken a risk initially? Didn’t its investors deserve to reap their new profits because they had taken the risk initially? Wouldn’t setting a precedent that their state-granted monopoly could be limited later actually inhibit future investment?