Americans would prosper more than any other people in a tariff-only tax system. This means that national politicians would not be able to compensate for the loss of revenue by imposing internal tariffs. It would take a Constitutional amendment to legalize them. Eighth, tariffs are not imposed equally on all goods. They are discriminatory.
Some goods escape.
This means greater freedom from taxes if we choose our imports well. Ninth, because tariffs are never imposed equally on all imported goods, they would become a matter of intense political warfare. In a world where only tariffs generated revenues, this would keep politicians busy in allocating favors within a shrinking percentage of the economy. I call this the sandbox effect. Cats, toddlers, and politicians belong in sandboxes.