It's a simple matter of of time and money.
In touring offshore, we spend so little of our time actually at work that we need more money to spend in our time off.
HEMS guys are constantly at work or on standby and have no opportunity to spend a large salary, therefore they get less.
Easy when you think about it!
P1
That my friend is a beauty hehe I will steal that and use it next time we meet for a few beers............. then run like **** before HEMS mate launches me over the bar.