Labor, like any other part of the manufacturing process, is a commodity, and,like any commodity, the money will flow to the most cost efficient source. That may not have to mean moving jobs to other countries, but it makes that decision a whole lot easier when you can shake the feds off your back, not have to deal with union thugs, and actually return a profit to your shareholders.
As far as slave labor goes, if slavery is ever found in a company’s supply chain, send every executive to jail. However, definitions matter, and if you ask someone working for a sweat shop whether the 3 dollars they earn in a week is slavery, they will tell you that it is better than the 3 dollars a year that they earned before the factory.
A tariff, like any other tax, will always be paid by the final purchaser, namely, you and me.
We also pay for the offshoring “savings” through higher govt costs, higher taxes and higher national debt.
But not as nasty as offshoring and re importing duty fee and pocketing the difference. That is called international labor arbitrage and is the stuff of revolution.