It wasn't called Work-Life anything where I worked. Policy was; (1) If your family was local then you can see them anytime, so you can work Thanksgiving, Christmas, etc. If your family wasn't local then you had all holidays off (Strangely, this seemed to be applicable only to management). (2) If you work here you have no life, so you're On-Call 24/7. (3) REDACTED
Catbert is expressing gratitude, but the 'nice factor' is surely neutralised by the backhanded insult.
But Dilbert will take ANY recognition he can get.