The issue happen if someone who happen to live in expensive countries see offers with too low wages for living a good life there and can't really compete. Cost

The issue happen if someone who happen to live in expensive countries see offers with too low wages for living a good life there and can't really compete. Cost of living in Norway is far higher than in India, if we adjust payments to an average Indian's residents will be happy, but Norwegian will be on the road. Inside a country surely, especially in big countries, cost of living might vary as well, but in a far narrower manner. For instance Italy south is around 30% cheaper than north (by a very generous amount), while compared to vast part of India the difference is around 80%. Compensate 30% is hard, compensate 80% is next to impossible. Surely you can emigrate, but did you imaging the chaos we will see for such mass migrations also mixed by many others (climate, war, ... migrations) amid closing borders due to scarcity of resources, geopolitical tensions etc? The world change and there is nothing strange nor wrong in it, but the rate of change matter, a slow change can be faced slowly, a bit at a time, a sudden change is like hitting descending from a tall building with a rope or flying down without wings or parachutes... We arrive to the ground in both cases, but in very different conditions.