Except that in advanced economies most people are not primarily motivated by potential future income when "choosing" their profession, an many people do not con

Except that in advanced economies most people are not primarily motivated by potential future income when "choosing" their profession, an many people do not consider it much at all (just look at people choosing to study literature instead of business admin). Some might say future income is their main motivation but are just irrationally motivating a choice done on some other basis (the starving artist dreaming of making it big). Even in more traditional economies, the son of a smith "chooses" to be a smith more out of filial duty than because its a job he has good potential to earn money with. Another reason is that he is too poor to change profession, and so does not change it despite there being a more lucrative opportunities.