Why does an increase in literacy rates often accompany an increase in per capita income?

people who have higher-paying jobs often have the time available to develop literacy skills.
developing countries have higher-than-average literacy rates, which typically leads to higher income.
people who can read and who receive an education are eligible for higher-paying jobs.
developed countries often attempt to raise low literacy rates to improve income.

People who can read and who receive an education are eligible for higher-paying jobs.

Explanation:

A population with a high level of education and literacy generates qualified people for jobs that pay a high salary and this generates an increase in income per capita.

However, a country with a high illiteracy rate and a precarious education, generates disqualified citizens for jobs that have a high salary. These people are subjected to unemployment, or precarious jobs with poor salaries and this generates a decrease in per capita income

affirmative action refers to the policies that take gender, race, or ethnicity into account in order to promote equal opportunity.

employers subject to title vii are prohibited from taking race or sex into account in any employment decisions. aa is a penalty for having any job group substantially statistically "underutilized" in any race or either sex. the employer must take steps to eliminate the underutilization, then stop, ending its aa efforts