These workers will be canned, blacklisted, and replaced by younger people willing to work for vastly less - all in under a week. The official message from our dear government after that (disseminated by the "terrible media" that the same government claims to hate so much) will be that it is all the fault of the workers and their union.
These are the people that work on the POTS network.
Perhaps if AT&T had thought ahead and moved to fiber end-to-end years ago, this wouldn't be an issue.
However, they still have tons of copper in the ground, and you're not going to find someone at a job fair that knows how to deal with that.