It has its own disadvantage. First would be strong competition. In the liberalization of the Southeast Asian economy each will be competing against each other in the level of communication skills, working standards, and many other criteria set to find the fittest of those qualities. Poor English skills will be disadvantaged, so as those will low productivity. Thus it sounds again more like survival of the fittest.
Issues like migrant labor exploitation may arise. Challenges like allowing huge flows of workers in rich countries like Singapore may not be feasible. There could be a shortage of highly-skilled laborer in his home country. Concerns with regards to language barrier and communication skills have been identified like extreme shortage of natives speaking foreign language (English), and this disintegration of language skills will result to difficulty in accessing new knowledge. We have to consider factors limiting the labor mobility such as language, new loans, and family adjustments.