Ideally that's the long term goal though, right? You want good local production, but not impair the trade forever. The best tariff would be a future one that achieves the shift by threat, then gets cancelled because the goal is complete and there's no point is impacting trade otherwise.
If companies believe today that in 4 years the tariffs will be dropped and that their investment in a manufacturing facility with 25% higher costs than the foreign competition will become effectively worthless, they will be reluctant to invest all that much.
