retard. > buyers has $40 budget > american company imports shirt for $20 > they sell for $40, and make $20 profit. vs > buyer has $40 budget > american company imports shirt for $30 > they sell for $40 and make $10 profit. buyers dont have infinite money. if you increase price, they just stop buying/buy used/etc forcing buyers to think/save money. also  > american company have the choice of buying shirts from india/malaysia/thailand/vietnam/mex ico for $20 and the money wont go to china directly. thus china loses money, even if china setup a shop in those country, the money going to china is cut by 70%+. this weakens the chinese economy.
United States