More expensive for other countries to make a profit here if what they do or make isnt from the USA. This allows American companies to actually have a competitive advantage. When we have been crippled by over outsourcing to foreign nations. This advantage brings back and generates more jobs within the USA. 

Foreign nations that want to avoid tarrifs can choose to open up shop here in the USA. By hiring American workers and shifting their products and services to American made. Honestly it is a pretty decent arrangement. 

Companies won't do shit for employees unless there is an incentive. This form of Tarrifs is an excellent incentive that can revitalize many of the most down trodden towns across our nation.