True, but this is not unique to Asia. In Middle east and parts of Europe I've seen a similar attitudes, especiall towards beauty in women. Also in the US, "redneck" is used as a pejorative term.
Right, because it refers to the guy with a red neck and bright white chest when he takes his shirt off, because he actually is working outdoors properly dressed for such work, not on a beach somewhere getting a leisurely tan. Thus, a red neck indicates working class.
Actual red necks, of course, seem to use it as a term of endearment and solidarity, much as other epithets have been co-opted by their targets.