[galaxyLogic]

> They have the skills (supposedly)..

But they are not accountable. If things go bad it does not affect their reputation since their id is fake.

They could be criminals who want to plant malware into your product. Or steal your passwords. Since they're working under false id in another part of the world it's hard to arrest them.

Employers are willing to pay a bigger salary if they think they have someone in the same country under same jurisdiction.