Most engineers in very low paying countries that are in any way good and can speak half decent English could easily earn multiples of what they're earning at ho

Most engineers in very low paying countries that are in any way good and can speak half decent English could easily earn multiples of what they're earning at home through skilled visas in any number of developed coutries. Most of these engineers take that option. They'll do "work experience" in their country of origin for a year or two, then head overseas. So most talent left in developing countries is usually not as good quality as what you'd find in developed countries that have attracted all the good engineers. Developing countries are known to have a big "brain drain" for in demand skills as they generally can't pay people well enough.