...and WHY would an in-flight relief (a supplemental crew member, boarded for the sole purpose of providing physiological rest to the operating crew in a duty period that is within legal limits) resting on the ground, be a problem? Given, it's nigh-on impossible to rest with cleaners, caterers and engineers swarming about, but I've seen it done. Some of our local lads and ladies, G*d bless 'em, can sleep anywhere!
The choice is simple - three shagged-out crew on a difficult pattern (done it many times myself) or one, who in a few hours can enjoy the delights of the pool at the pub and be seen whooping it up in downtown BKK a few hours later or be on the tee for a 0900 foursome?
Kitsune, I do realise it's CX-bashing season, but this is almost certainly something you know nothing about. It's not pleasant, it's not quality rest, but it's not illegal either. Down, boy.