We generally assume that higher education offers higher income.
But this above chart displays common jobs and salaries based on the amount of training (education) needed.
If we compare zone 1 employees to zone 2 almost all the employees earn between $ 17,700- $18, 300(waiters/waitress and bartenders) equally except septic tank services when compared to forest fire fighters. However both zones require a high school or high school diploma.
Similarly zone 3 employees earns as equal as the zone 4. But there is little difference in educational qualifications. While, zone 3 requires vocational school certificates, zone 4 needs a four year bachelor degree.
However, zone 5 is quite unique and promises higher income. For example, surgeons earn par better with all other professional in the zone.
Despite unequal education background, most similarities in income levels can be found between zones 1-3 where as zone 4 and 5 has advantages with education.