I presume you're referring to a Radio Operator Communication Certificate (ROCC).
You don't get employed solely as an A/G operator, it's usually in addition to some other task such as mowing the grass, marshalling or re-fuelling.
Having said that, I was asked to help at an airfield where their A/G operators all suddenly left and I asked for and got £120/day, from which HMRC (due to it being a second job) took 40%.
If you really want to get paid, you have taken the first step towards getting a FISO (Aerodrome) License, which requires you to hold an ROCC when you commence training.
Last edited by chevvron; 10th June 2015 at 11:03.