These contracted employees are working for other companies, not directly for Google. Their employer is Adecco or some other staffing firm (which I guess would

These contracted employees are working for other companies, not directly for Google. Their employer is Adecco or some other staffing firm (which I guess would vary by office). It's very rare to see a large tech firm contract directly with an individual employee, and it would be incredibly rare to see it happen with a lower paid position. I've never seen it personally.