If the world wants to maintain freedoms in trade and capital

Systemically speaking, if the world wants to maintain freedoms in the trade of goods  and the movement of capital, it must liberate movement of labour & services too.

Otherwise, look at the global, EU, EZ other systemic crises driven by uneven freedoms and the systemic instability they cause. 

Eg see what Achilles Heel for the EU Single Market and Single Currency low intra-EU labour mobility is.