Looking over the two tropes and their examples, I'm not seeing nearly enough cause for merging. However, what does need to happen is making sure that the examples are on the pages they need to be on...skimming through Workaholic, I saw a few that read like they'd be better suited for Married to the Job.
The difference seems to be that Workaholic is about characters who work a lot in general, while Married to the Job is about people who work a lot and this is specifically detrimental to their personal life. The latter is probably a subtrope.
Really from Jupiter, but not an alien.I suspect you can be Married to the Job without being a workaholic. I don't know if it's ever occurred in fiction, but I think it's—barely—possible: no life outside of work, no interests outside of work, but only clocking in forty hours. Just a very, very boring person the rest of the time. And probably not very intelligent.
Speaking words of fandom: let it squee, let it squee.Maybe rather than just a "See Also", the pages could explain their distinction from one another? It might help keep the sheep from the goats, so to speak.
I added commented-out notes about the differences to the pages so when people edit them they're the first things they see, but that's not a bad idea either.
Clocking for inactivity.
"For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled." - Richard FeynmanClock expired; locking up.
"For a successful technology, reality must take precedence over public relations, for Nature cannot be fooled." - Richard Feynman
Workaholic and Married to the Job revolve around the same topic, only that Married to the Job deals more with the impact it has on personal relationships. Still, the overlap is so big, that I would call for motion to merge.