I wouldn't bring Samantha to work with me unless I had a burning desire to refile all of my paperwork the next day. But if she were older and could occupy herself for several hours at a time with minimal interaction from me, I think it'd be okay. If she were 10 or 11, she could easily sit and read or play on the computer while I worked.
ETA: Hmm. I just reread the OP. It wouldn't work though on a regular basis. Possibly if I homeschooled and could have her working on her school work while I worked. But otherwise, if she were old enough to occupy herself for 7.5 hours each day while I worked, she would be in school during that time anyway.
As an employer, if I felt that it helped me get and retain better staff, then I would provide an on-site creche.
Depends on the job and whether or not its allowed. I can't imagine getting much work done with kids around, but otoh, if a parent works at say a daycare or something, then I can see it.
My best friends dd was able to bring her son to work with her when he was a newborn. It worked out really well, but he was an easy baby and it was not an every day thing. She also stopped completely once he was mobile. This was a very casual office environment and she had worked there for several years prior to having the baby too.
"Now when I need help, I look in the mirror" ~Kanye West~