I was living in Singapore at the time and I agree with Slasher. Captain of 185 was a high flyer in the SAF but didn't make it into SIA so went to Silk Air, considered a second best to ex SAF pilots and something of a loss of face. Progression to SIA was not impossible but he would have been junior to some of his previous 'Juniors' who did make it straight into SIA, everything else is history. We who lived there at the time had little doubt but no evidence as to the cause.