Market Forces
At the end of the day, it all boils down to market forces. Nobody owes anyone anything.
If SIA/SIA Cargo can keep its expat community with current HA, it will. If it cannot, it will increase it. Simple as that.
Correct me if I am wrong but I think Silkair/Tiger Air captains do not get any housing allowances. Why? Because the company can get away with it.
The grass always seem greener on the otherside. Who is giving a better deal? Why hasn't there been a mass exodus? We have pilots from Emirates and Korean who have left and join SIA Cargo.
Everyone would like more but one must understand the basics of economics, demand and supply.
The more you get worked up, the worse of your life is. No point banging your head against the brick wall of basic economics.
CargoBoy