You obviously don't know anything about the US government. Without transparency there is corruption. Why do you think everyone is upset over the Trans-Pacific Partnership deal being done in secret? The US government can not be trusted.
The only information in this case relevant to check is the salary itself. You can avoid the company name entirely, have only title and location, and get that information as well, and that protects the identity of foreign workers considerably.
The most recent example of this: http://www.washingtontimes.com/news/2015/may/19/pentagon-was...