People really should report anyone breaking quarantine. This have been imposed to help everyone else. Those people gave no morals and should be deeply ashamed of themselves.
I would also be annoyed that I wasn’t going to be paid but I would most certainly do as instructed by the government. Surly people at their place of employ will know that these people were away in Spain and haven’t quarantined, if they don’t watch out, they could be sacked.
In truth, I am horrified that those people have no regard for their fellow man. If everyone did this, you and I could and many others end up in a hospital or worse, a mortuary.