We were hired to test public opinion on a particular subject and with no ax to grind, that's exactly what we did. We don't have to agree or disagree with the questions, we simply ask them and provide the client with a fair and accurate set of data reflecting public opinion."
This may be fairly glossed as "We're just hired guns, with no ax to grind. The client gives us a bunch of questions, and it's not our function to agree or disagree with them; we ask the client's questions no matter how slanted they are."
Which I suppose is to be expected. Who would hire an agent to ask their questions if the agent was going to disobey the instructions given and spoil the impression the poll was designed to make?