[eli_gottlieb]

>Global GDP would double if labour was allowed the same freedom of movement as capital.

Really? And would global average wages double, or would the profit margins on ever-cheaper labor do all the growing?

[wrong_variable]

Assuming inequality is constant - then yes. Your purchasing power would double, you could afford twice as much food, apple would produce twice as many ipads, etc.

[eli_gottlieb]

>Assuming inequality is constant - then yes.

Variables rarely remain constant in the real world in the way that they do in ceteris paribus thought-experiments.