The off topic flags don't currently offer any option for when a question doesn't fit within the framework of Workplace. I site this question as an example; it's not relevant at all to Workplace and so when trying to flag I was looking for something along those lines, but there are only 3 specific reasons for flagging a question off topic currently.
We need an option along the lines of This question is off topic because it doesn't appear to be about the workplace. This would be similar to how SO has an option for flagging questions for not being about programming.