Good question...
Based on the company's actions, I'd say it won't happened until they're backed into a corner with the "gun" of a LEGAL strike threatening them.
They just have no interest in rewarding their employees. They'd rather intimidate, strike fear, and get more senior pilots to go to other airlines in disgust, thus lowering their employee cost structure.
Klaus was quoted one day as saying "I'd question the intelligence of anyone who wanted to make an entire career of AirTran".
On a side note, I just won my first of 4 major battles. They denied my unemployment claim saying I was terminated for fraud. I appealed that decision and won. The administrative law judge who heard it made the decision, stating that "The company failed to carry the burden of proof". Basically, that a video of me changing a tire 2 days before I returned to work isn't proof of falsification of an OJI claim.
Next is OJI denial appeal, then Grievance, then Civil suit for career earnings plus damages from my ruined major airline career. Can't even get picked up by Netjets or Virgin America at this point... They WERE going to interview me, but after my termination was official, they rescinded the interview offers.
The way AirTran operates, only force is going to be useful at this point. "There is a time for diplomacy, and a time for action. Diplomacy is dead."
Choose your representatives accordingly...