Even the "best contract in the industry" (to quote you) is worthless when it can be modified by the company at will and without repercussion.

The precedent has been set. SD can change the contract whenever it suits him, and DALPA has shown it's willing to use its negotiating capital to uphold the contract.

Think about it: DALPA negotiated when the company ignored the contract, expended negotiating capital to enforce the contract! That's madness.

Oh, SD's memo also validated this future tactic: Taking hostages is an effective strategy.