We globally have (relatively) free movement of money, goods and services. What we don't have globally is (relatively) free movement of people (for work). I do

We globally have (relatively) free movement of money, goods and services. What we don't have globally is (relatively) free movement of people (for work). I do believe, that if the world were to add free movement of people to the first lot, within a generation you'd get normalisation of incomes and lots more besides (laws relating to workplace rights, OHS, environmnental etc). Of course that pain that would be suffered in that generation would be pretty huge as entire populations started moving. It's a pretty big perturbation to settle into a new stable state.