Pay much less
Here's another one. If you employ expatriate staff then you must expect them to think in their own currency, they will still have mortgages at home and will wish to save in that currency, to use UK£ as an example.
Joining pay for an FO is 56,992HK$, 6 yrs ago at 10.7 this was £5,326. It would have looked very attractive at the time.
No pay rise since then.
Now at 15.5, this same sum is only £3,677.
Can you spot the difference? Not to mention the inflation that has occured in that time.