You have disgruntled employees everywhere. I think the real difference is that in places like the U.S (And Israel) people where raised with a sense of self entitlement, they all KNOW they deserve better (And IMHO they do!).
Some cultures have a sense of self-deprecation, which basically means you should be glad to have even the crappiest job even if it is frozen manure shoveling.
On a personal level, everything said reflects on me perfectly. I just quit the job i had for the past 3 years (IT manager/Support/Trainer), since upper management decided to replace our very loved manager with a douche. Our current manager knew how to take a small team, get them to work hard (even very hard at times) and still come back to work the next day with a smile. My salary was lower than what i could get working in a similar position in a different place (and i was constantly getting offers to let me know that), but i was happy - so i stayed.
Now that i have left, i am joining a relatively new business as a partner - an offer that i politely declined until now.