think-o: nothing more meta-level than getting paid to find people jobs

When your sister tells you that she's interviewing at a staffing agency, it's possible -- likely even -- that her intention is to use the staffing agency to find a job at another company. [0]

It turns out that some people have jobs that are more like "do work" than "build tools that enable other people to do work". (surprise!)

[0] NB: I suppose it depends on your sister.