Irrespective of industrial confrontation, or whether expats should or shouldn't be on the property, the larger issue is flight safety.
The hardest part in changing KAL's cockpit culture is to unlearn the old ways of doing things. The quasi military hierarchy has to be dismantled in a tough in house "re-education" center. Disciplined cockpit procedures and crew coordination must be taught and practiced over and over in the Sim; performance must be videotaped and played back during critique. Strict standardization techniques must be enforced in the Sim and on the line. 300 hours operating experience under the supervision of a check airman. Captains cannot be allowed to individualize procedures; First Officers and Second Officers must be taught and encouraged to be assertive.
Only tough discipline and hard work will break the oldtimers out of the mold.