At the same time, barriers against unskilled workers have been strengthened. The ability to use skills also varies and can constitute a cost to the migrant and the economy, If the migrants had unskilled jobs while working abroad, they will have little experience that will contribute to the development of their home country upon return. Additionally, even if the worker learned new technical or industrial skills, they may not be able to use them if their country of origin does not have the infrastructure or institutional framework to support them.
Concurrently, barriers against unskilled workers have been reinforced. The proficiency in utilizing skills also varies and can represent a financial burden on both the migrant and the economy. If migrants held unskilled jobs while working abroad, they would likely return with little valuable experience that could benefit their home country's development. Moreover, even if a worker acquired new technical or industrial abilities, they may not be able to apply them if their native country lacks the necessary infrastructure or institutional framework.