Who Makes More - Blue Collar or White Collar?

Payscale reports:

Do white collar jobs bring home more bacon than blue collar jobs? It's common to assume so. But according to a recent PayScale survey of job duties, salaries and career paths, white collar jobs don't always beat their blue collar counterparts. Let's take a look and compare the average job salaries from a list of white collar jobs and a list of blue collar jobs.

College Professor or Prison Guard
The average job salaries for mid-career prison guards range around $60,880, 3 percent higher than the typical salary of $58,876 for a mid-career college professor. Prison guards in California enjoy an annual salary of $73,428 with only a high school education, and with overtime they can surpass the income of California judges, police and even the state attorney.

Because you know, California prison guards are in the business of altruism.