You no longer need actual strikes to pressure the company - ballots can have the same effect, since they carry the threat of strikes. It would now appear that a simple, well-placed cross on the ballot paper removes some of the need to actually lose money and stand on picket lines.
DH seems to be rapidly losing touch with reality if he really believes in what he's written on the CC thread. He is definitely running out of ideas on how to successfully pursue the dispute.