If I order a pizza and the stoned teenager from the local joint runs over a pedestrian, am I ethically responsible? I didn't tell them to not hit people when getting my meat lovers to me and did say I wanted it ASAP.
It's a pretty rotten analogy.
Randstad hired the people, Google contracted Randstad to do a job. Randstad's people did it in a shitty way that is hard to expected.
It's a pretty fresh analogy.
No, you are not responsible because the teen was not operating within the terms of the contract. You did not authorize or ask him to get stoned or run someone over.