The most notorious pattern shows that <em>those who are qualified to occupy a role of functional importance</em>, which is the degree to which a job is unique job and requires skill, <em>tend to earn more than those who support lesser functions. </em>
Whether only a few or many other people can perform the same function adequately is directly related to the expected proposed wage, meaning that the lesser the amount of qualified people that can successfully perform a task the greater the wage is expected to be.
Deflation would be the biggest problem because deflation is the depreciation of money. Another point of view is that if you have a surplus of something it will have less value
Oil and silk because the Africans would make dresses out of the silk
