Do current FTAs include the provision that other signatory nations will also levy a 150% tariff against imports from non-participating nations?
If not, all you've done is set up a a system that is easily circumvented by transhipment through one of the participating nations.
The only REAL solution is to exert sovereign authority over our own borders and levy a relatively low (10~15%), flat-rate "revenue tariff" on ALL imported goods, regardless of nation of origin.
"We are infinitely better off without treaties of commerce with any nation."
--Thomas Jefferson to James Madison, 1815.
The whole cartel has to participate, otherwise its useless.
The point behind what I am talking about as opposed to flat tarriffs (which we have them right now) is to expand the market base through development.
Market base is people who CONSUME goods and services, not SUPPLY them.