It's an interesting phenomena, this 'cost-shifting' from ANSPs to airlines. Because that's what it is- reducing costs for the ANSP (such as staff trimming) without heed for the subsequent increase in costs to the airlines as they experience inefficient flight levels/routes, delays etc.
I'm amazed that more airlines, seemingly demons at watching costs, haven't woken up. Virgin seems to be, in Australia
Virgin Blue to pursue AirServices Australia for compensation for its air traffic failures – Plane Talking