The different in Bak Kwa prices between US and Singapore boils down to two major factors:
1) Cost of Labor -
In Singapore, affordable foreign workers (mainly from Indonesia or the Philippines) keeps prices generally low, as oppose to US workers on hourly rates + benefits + insurance...
2) Meat Prices -
With China buying up major pork producers like Smithfield Foods, meat prices have continued to rise with no end in sight. Wholesale beef round cut prices have also risen 40% since the end of 2013.