Actually, since the article referenced mentioned that Kelly is now the 2nd largest employer in the USA, they are, subject to a couple of caveats:<quoted text>
And temps have no benefits of any kind, and are glad if they get the money promised on time.
Temp service companies (like Kelly) hire someone and they are "sent out" on various types of jobs. They are employees of the company (Kelly) and after they've worked there for X number of hours, they are eligible for health benefits, vacation, etc. just like a "regular" employee.
The (potential) problem is, they have to work long enough for the company to be eligible, many don't or bounce around from one agency to another. Another problem is they may not be paid enough to afford healthcare.
My wife was in the temp industry for over 30 years, I verified the above with her.