Many times PR people claim that they work they do can not be accurately measured because PR work only produces intangible results, which means you are not going to be able to see or measure any of benefits that your PR campaign has had. But the truth of the matter is that these people are just being irresponsible and are not claiming any kind of responsibility for their work. Many times you will see this answer come up when the group meets to discuss how things are going or if the company has not seen any kind of an improvement in their bottom line. What usually happens is that the PR people claim that you can't really measure what they are doing because the market share is always shifting so you can't accurately measure it. But you can take one guess that even if you are not seeing the results that you want to be seeing these people still want to get paid.