In Reply to: that's correct Mic posted by clovis on Saturday, 9. October 2010 at 20:44 Bali Time:
it's a compulsory payment.
It doesn't matter what religion you are.....you have to pay.
Express services however are another matter, and entirely a matter of choice for the traveller, as is business class, express boarding, loyalty programs, lounge memberships etc, as you will know.
I hope this clarifies things for you.