Instead of kpkb via the States Times, why not Tung Luk boss opening states the condition and job scope of the $1,800 per month salary? I bet it will be the same as that sushi place, after people found out the scope, it is no wonder no one wanted that dishwashing job even though it pays $3000 a month!
Comparing even Jakarta, why not the boss try bring the sam menu and price list in Singapore dollars and try to sell in Jakarta, with all the other much lower costs in labour, rental, etc? See if he can survive there or not?
Lousy business plan and cost structure and trying to blame local for his failures!