[dontlaugh]

Workers in Germany, Romanian and Vietnam doing the same job at similar productivity are paid very different wages. You can see this quite clearly in German companies that open factories in poorer countries to extract higher profits.

Capitalists pay the lowest wages they can get away with. While they exploit all workers (by appropriating as profits much of the value created by those workers), they exploit the workers in the poorer countries far more than those in the rich countries.

They can get away with this largely because the poor countries are underdeveloped (and are often kept that way on purpose). Workers in those countries have fewer options, thus can be exploited more.