I understand from a ramp agent at PMI that basic pay for coach drivers during the Summer season is £500 a week. During the winter months, they are paid a subsidy of around £900/month from the equivalent of the Spanish dole.
If these figures are correct I'd say around £16k to £18k a year.
The figures are irrelevant really... if the drivers vote to strike that's their business, but they could pack in the bully-boy tactics of slashing car tyres, scattering nails on the roads and intimidating passengers. The snag with capitulating is they might feel inclined to do the same thing next Summer knowing it's going to work... difficult to say really.
I think the criticism of the tour operators stems from the fact that they had advance warning that this was going to happen and did nothing... I think it took all the charter operators by surprise, and my company reckons it is the worst disruption it has ever seen.
The coach drivers aren't going to be making much cash when no-one goes back next year though...
They're threatening another in ten days time.