In the foreseeable future we might not have any choice about international trade. If the price of oil -- and thus the price of international shipping -- rises significantly, the whole system is going to rebalance anyway.

If that should happen, if international trade is suddenly made much more expensive for everyone, would that disproportionately hurt the working class? I'm not an economist, but I suspect it's the people currently at the top of the system who would be hurt more.

If I'm right about that, then it shouldn't matter whether the increased cost is from the price of oil of from tarrifs. It's not the working class who feel the most pain. (Unless the top 0.1% manage to increase their proportion of the total pie even more.)