Long story short.
It's not right to pay someone else to develop content and then represent it as original.
I have often marveled at how some consultants seem to be busy as hell yet seemingly possess a superhuman discipline and creativity to pound out decent content.
For some their "secret" is ghostwriters.
A ghostwriter is paid to develop content that is credited to another person. Many blogs and books are written by ghostwriters in a manner to appear as if another actually wrote them.
This is a common practice.