The Negative will want to limit free trade to only nice and pretty and moral things. You want to show the morally bankrupt potential of free trade without the moral boundaries that fair trade offers.
This negative case will not reduce the debate to capitalism and socialism. Instead, we’re going to argue that valuing fair trade over free trade leads to inherent bias in the market. The destruction of justice and impartiality inevitably leads to a loss of economic growth and consumer trust.