I was looking at that last night and thought the same thing - that is cheap labour.
Here is Australia, minimum wage is a little higher than it is in the US (for the most part), but if you are employed on a casual basis - which I'm assuming these people will be - then you get a slightly higher rate of pay. This is 'casual loading' to compensate for the fact you don't get sick leave and holiday benefits. Shame that Disney can't seem to do the same.
At those wages, you'd have to work a 7-hour day in the park during peak time to be able to afford a ticket to get in and enjoy the park as a guest.*
*Based on a HK $350 ticket during peak days. You'd only have to work 6 hours on a Regular day, when ticket prices are HK $295
“I don't mean to sound bitter, cold, or cruel, but I am, so that's how it comes out.” - Bill Hicks