Anyone who strikes now is off their rocker! It will do no-one any good and drive whatever airline further into the ground. HV has always been flexible because the staff are flexible. Trouble is that the passengers are only interested in paying less for their seats which means less money for those doing the work. If the yield on each seat is less then there's no point in the staff asking for more.
HV has made money for years but for the majority of those years the black ink came from aircraft sales and some damn good accountants, not seat sales.