"What do you mean like no tariffs?
or that you can outsource your labour?
or that it's all outside the control of governments an run by multinationals."
completely unrestricted free trade is pure capitalism. it allows for the exploitation of the proletariat by the bourgeoisie. simply, labour standards cease to exist and a select few control the political scene due to their immense quantities of money.
remember the formulas for capital: M-C-M' and C-M-C' where C'>C and M'>M, M=money and C=commodity. this works, but the opposite of this is observed by the proletariat, who become more and more impovershed. monopolies and trusts form and the proletariat becomes far more rapidly impovershed