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Yes. Trades are considered blue collar even when the worker is highly skilled. Office workers are considered white collar, and a new term, green collar, refers to those employed in either office or trades in an ecological endeavor.
White collar workers were more likely to be longer term employees with seniority and accrued benefits vs. hourly/labor employees receiving no such vacation from the union hall.
Blue collar work.
Edwin Sutherland in 1939
Professor Edwin Hardin Sutherland
(They could stop working when the boss went home). White-collar jobs are more typically office jobs, so they usually end at five pm. Blue-collar, service-oriented jobs can be done whenever necessary, so they don't have as much flexibility.
It described the clothes middle class workers wore.
"Blue collar" is one, 'professiona'l or 'trades worker' are a couple of others.
The term "white-collar crime" was coined by sociologist Edwin Sutherland at a speech to the American Sociological Association in 1939. He defined it as non-violent crimes committed by individuals or corporations in positions of trust or authority for financial gain.
White collar crimes
I think you are referring to "white collar crime" but it has nothing whatsoever to do with their social status. A low-level clerk or accountant in a business can commit white collar crime just as easy as the CEO.
The term "white trash" is used as a disparaging term for a poor white person or white people (often perceived as being lazy and ignorant).