Coalition ministers continue to talk as if a level playing-field exists in the global marketplace, writes Colin Teese, former deputy secretary of the Department of Trade. Almost everyone accepts that genuine liberalisation of international trade in agricultural products is a lost cause. Even the ideologues accept this; but they are now saying it doesn’t matter. What they won’t accept is that, in the end, political realities will always trump economics. Perhaps, in a democratic society, that is j…