There are actually a number of different issues you raise here, so I'll weigh in on just a few of them:
1) Oftentimes the "irrationality" of domestic consumer behavior (i.e. paying more for products made for the domestic market vs. foreign markets) is encouraged by a great deal of marketing (which is often indistinguishable from urban "word of mouth" myths) about the high quality of domestic products over foreign ones. For example, the ridiculous hubbub over mad cow's U.S. beef was not some grassroots movement, but politically and economically funded and motivated.
While I would agree that with greater globalization and the spreading of IT these propaganda campaigns designed to control domestic demand will become less effective, I actually think there's a better chance that firms will change their marketing strategies. In other words, let's not hold our breath that suddenly Korean consumers will be treated better.
2) The labor market has traditionally been even MORE tightly controlled than consumer demand-- and in Korea keeping labor submissive and wages low was one of the core engines behind its economic development. Everything from the education system, to the constant threat of war, to compulsory military service, to union busting, to family relations, to cultural control via the reinvigoration of neo-Confucian values, and the list goes on and on, were mobilized to ensure this single cause.
Clearly, as you point out, this model is outdated and laborers in general are chafing, but a transition to a more "open" labor market that rewards productivity, innovation, etc. requires alot of things to happen right:
a) There need to be much more attractive options to a traditional firm job at a jaebul. And frankly, to date they simply are not.
b) The education system needs to be completely retooled.
c) Cost of living must stabilize, so the pressure to work can be put into more reasonable context. For example, the ridiculous cultural practice of having to own a home to be considered normal needs to be done away with. Either that or the real estate pricing bubble has to burst (but this, in turn, would also suck badly for everything else economic)
d) Chaebuls themselves have to remain inflexible. For some reason I'm a believer that once chaebul sense that they are at a crisis level, that they will adjust labor and management practices to lower and contain discontent.