Hiring a Virtual Assistant

My friend(I won't mention her name here) is paid to write blog posts for a doctor on his blog. She is not a doctor at all but she is being paid.  Others I know have hired interns to write posts for them or to send out tweets on their behalf.  

Is this cool?  Is this a new and necessary field of work?  Are we creating new jobs by outsourcing these tasks?  Do posts and tweets have to be authentic?  Do they  have to come from the original creators?  HMMM.  

I am not judging--just questioning!