It is plausible that congestion pricing could make the bridge more efficient; whether it’s morally justifiable comes down to who the money goes to/how the money is used.
If the money gathered from the toll/congestion pricing goes to the Troll, it’s bad, even if it makes the bridge more efficient. It encourages more trolls, and the fact that the Troll accidentally increased the utility of the bridge shouldn’t count in its favor.
If the money goes to the engineer, her investors, or the towns themselves, then, rather than being extracted by an external entity, the value is captured by those within the system. People are incentivized to produce more good things (build more bridges, so to speak).
It is plausible that congestion pricing could make the bridge more efficient; whether it’s morally justifiable comes down to who the money goes to/how the money is used.
If the money gathered from the toll/congestion pricing goes to the Troll, it’s bad, even if it makes the bridge more efficient. It encourages more trolls, and the fact that the Troll accidentally increased the utility of the bridge shouldn’t count in its favor.
If the money goes to the engineer, her investors, or the towns themselves, then, rather than being extracted by an external entity, the value is captured by those within the system. People are incentivized to produce more good things (build more bridges, so to speak).