WINZ Case Manager pays beneficiary "under the table"

I know of a person who is on a benefit. This person is looking for a job and told me that a Case Manager at WINZ thought that their section could do with a bit of a spruce up and is paying this beneficary to do it for a few days.

Now I don't have a problem with beneficiaries earning money on the benefit, as long as they declare it. But it seems a bit dodgy to me that a WINZ staffer is offering this person a cash job which will no doubt not be declared to his benefit, and he is not paying tax on it either.