And what reaction from the contractors? They trip half way across Europe in their own time and at own cost to position in for a few days supposedly lucrative work. They then find, at last minute, 50% of their flights are cancelled. They sit in an hotel at their own cost on unpaid SBY and then trudge their weary way home, to be repeated. If I treated a contractor like that, i.e. they turned up at my house and I said "sorry mate, but I'm off out for the day," I would receive a bill for their wasted time.
If it is true rostering staff have bailed out (or is it crewing) how will any roster be published? No roster = no crews in the correct place at the correct time. And how does Flt OPs, or commercial, decide which flight to cancel? Is there a morning dice-rolling session?