Actually, Manpower, Inc. is the largest employer in the world. If anyone has ever worked the "Temp Circuit" for any time at all, you know what a cr@ppy job being a Temp is, versus working for Wal-Mart. *Rolleyes*
Manpower, Inc. must be unionized, or the union pukes would be taking out ads against them too, right? ;)
http://www.doleta.gov/brg/Business_Solutions/Manpower.cfm
I've never worked for them, thankfully, but I have never found anything trustworthy about Manpower, Inc.