Not another disagreement with Sid - I must be mad!
As both full time and contract auditor myself in a previous lives (?) and now managing a pool of contract auditors I can only say it depends on the individual. Contract auditors tend to be sensitive to the impact of the NC with the client as they have been (and sometimes still are) on both sides of the great audit divide - we encourage our auditor to apply the "Peacock" test to NCs (named after a good colleague still working at BSi) - and that is to write out the NC in rough (before commiting it to the report) and saying "So what?" afterwards and if you can't think of a good answer to the "So what?" then throw the piece of paper in the bin without raising it as an NC.
By contrast I have shared a room with a group of full time auditors as they share experience of non compliances to "get" the client on. Thankfully less prevalent now!
There might be a short term leaning to avoid the risk of being rejected by the client but we try to put the message across clearly that they are not there to find NCs that add no value but they are there to assess the effectiveness of management systems and we will stand behind them if the NC is valid.
If we have to take them off a job because the client is set against them then we find them another job to replace it.
Obviously, the number of NC's does not tell the whole story. But there is anecdotal evidence that contracted auditors (vs. full time employee auditors) write fewer NC's, compared to the fully employed counterparts. The primary reason is the fact that auditors realize that, if they upset the paying customers, they might not be welcomed back.
By contrast I have shared a room with a group of full time auditors as they share experience of non compliances to "get" the client on. Thankfully less prevalent now!
Don't get me wrong. I am not saying that all contracted auditors are bad and all full time auditors are good. Not at all. I personally know several contract auditors that are extremely good at what they do. But being black listed from a client has obvious different consequence$ for the two categories. After all, contrary to what many believe, the pocket is the most sensitive part of the human anatomy.
If we have to take them off a job because the client is set against them then we find them another job to replace it.

