What would you guys US ALPA would say if there where a bunch of European pilots flying around for Southwest or Jet Blue. It would be a bloody riot.
It is not the job of the respective CAA to control the flood of "Foreign" labour into a EU country rather the it is the job of the governments to do it.
A good formula to keep the undesirables out is: Work permit as a prerequisite for a validation. No work permit, no validation, no job.
AD