Why do people think "enforcement is impossible" is such a strong argument against taxes?
If your argument is that tariffs don't disincentivize behaviors because the government is just that bad at collecting taxes, you're not really in step with reality.
But you can't enforce your taxes in other governments.
In fact other governments in a game theory like ploy to get ahead of your country may agree to international agreements that they know they can game to their advantage.
The fundamental assumptions are wrong. You're not in this together. All countries are in direct competition, and some a more cut-throat than others. If potential disaster B is coming irregardless, country B can position themselves to come-out on top of country A when it does.
An argument could be made if we don't apply the Carbon Tax to poor or third-world countries it will help them develop faster... but those third-world countries shouldn't be shipping us resources in the first place!
>It's pretty simple, this has been thought out
You and others alike have clearly not thought this out as the scenario i have layered out is already happening with other tariff-able commodities.