Management have never done it!
Just a point regarding the suggested(?) new terms and conditions for crew rest.
NONE, I repeat NONE of the current manangement, from DCP upwards have ever, ever, completed a lengthy period of long haul flying on the B747-400 and know absolutely nothing about the fatigue caused by such flying or the effects of improper rest facilities.
The most junior of the DCPs will have completed their normal line flying career on the -200 and -300 with the appropriate sector lengths and crew operating patterns, sector lengths and COPs that bear no relation whatsoever to those currently being flown by the -400 crews.
As someone mentioned elsewhere, have SIA even offered two standard business class seats, surrounded by curtains, in the quiet part of the EY cabin? I doubt it.
After a certain very presumptious lady from the Commercial/Marketing department got denied a jump seat out of SIN, (SIN-HKG-SFO), having considered it beneath her to bother to ask the operating captain and assuming she had a right to it, (could also have bought an ID 90% in First!), it has only been a matter of time before these unique and spitefull people would try to get their own back on the tech crew.