Yes, it's not about skills/time/price it's about the relation of the worker and the market, this market is very much not a local market, but almost completely g

Yes, it's not about skills/time/price it's about the relation of the worker and the market, this market is very much not a local market, but almost completely global one, wages however stay very local. Costs differ, but they don't differ uniformly nor do they differ in the same ratio, sales are more globalized than the workforce, so this fact alone tells you that the wages will lag behind the trends (like behind inflation). There is no scientific way to measure this price difference, our best practical way was with local currencies but that's now abandoned in favor of more federated monetary systems. Costs aside, which represent a relative and local measure think about the absolute measure, which you need to measure savings.