The Rotor & Wing annual salary review will be out soon, and is a good reflection on pay checks in the US and Canada. But, for the rest of the world there doesn't seem to be much consistancy.
In Europe, UK & Ireland included the specifics of Helipilot employment take on many variations. Apart from distinguishing SAR, Off Shore, Air Amb, Police, Corporate and Utility..........other dynamics of pay have a big factor to play...Tax, Pension scheme, Loss of Licence Insurance, Transportatin Allowance, Medicals and License Requirements ( which are very different in the JAA with each member state..Tax too).....uniforms etc..........
One thing is for sure, The North Sea is a Hostile area........and I ain't talking about the legal B**L......................You got to fly IFR at FL 60 just to get a bit of sun on your face...so the Pilots do earn their income there.
The most lucrative deals are probably in the Corporate and Flight Ops Mgr positions...............but they have their headaches associted with the big checks!
It's up to pilots themselves to self promote their own value on a given job...not easy, but gives the best results in the long term and everyone benefits....................Experiance is the big key along with the Certs and types held!!