Even a wall...
Each of the stones in this wall was carved by hand, using a chisel and hammer. That is the way it is done here. As a columnist observed in Sunday's paper, a laborer here makes about one-twentieth what he might make for doing the same job in the UK.
If governments were to truly wipe out trade barriers, the entire world would have to make quite a few adjustments. I certainly wouldn't have a clue on where or how to begin a system incorporating real fairness.
On a micro scale, we try to be fair with all whose wages we are involved with.