Blue-Collar vs. White-Collar"

Somewhere along the line, the terms “blue-collar” and “white-collar” took on meaning beyond simply a way to categorize the work force and became commentary on socio-economic status. A “blue-collar neighborhood” would be one in which middle class and lower working class people lived. A “white-collar bar” would be patronized by young, upwardly mobile, professionals, hence the term “Yuppies.” Along with this added meaning to these terms came the assumption that white-collar jobs paid more than blue-collar jobs.

So do they? Compare the occupations and their salaries.