As a current RYR pilot who has friends in the base concerned and access to our own association forums where this is being discussed in much more detail than an open public forum, I can tell you this is very real.
Initially it started off with RYR employed pilots and cabin crew. Just recently contractors who are based in BGY have started to receive letters for tax payments dating back to 2006. Past and present based personnel.
So far its only confined to our Bergamo base.