Damn, is that the power of machinery or... ?

Source

edit : didn't mentioned that the interest i saw with the graph above was that it's usually considered cheaper to work in China, and that developing countries need to 'be competitive'/'lower their salaries' in order to attract investments. This graph points out to the existence of other factors than wages in order to 'be competitive'/'attract investments'. Perhaps that a country should( somehow) become wealthy enough to enable its own capitalists to invest in machinery, leading to 'higher salaries'/'more (productive )investments'/'higher competitiveness', i.d.k. Still don't know as well how China escaped the trap that every other country fell in.