What is this talk of strike? It is bolleaux. There are no grounds to ballot for one as there are no grounds for strike (sorry about the tautology). No jobs are under threat as far as I am aware and it would be difficult to demonstrate that this practice had led to any degradation of T&Cs. If you think otherwise put it to your CC.
The strike weapon is one that is wielded with more care than a firearm, we are no longer in the days of yore when tools would be downed at the drop of a hat because someone was a bit peeved at something, even those days are misrepresented.
Much though I find this practice to be odious there is no short term solution that I can see. It is the free market at work and do not forget that is the world in which civilian aviation operates, much thought it grieves this left leaning poster to state.