I agree to a certain extent about limiting non ergent cases. But what I think really needs to be done, more than anything, is for the government to educate the public.... that it is wrong to tie up the A and E department with non emergency cases.
Maybe they could start early with school age children how wrong it is, with a media campaign to bolster it, or are Hong kongers too set in their ways to change and the only (sad) thing left is to charge them more in the hip pocket?
Another idea would be to hit folks who have a combined income of say, 600,000hkd per year with mandatory private health cover, thus focusing free public health made only available to lower income demographics. That would take a measurable load off the system, I reckon..