Since thread is about workers being unhappy, this may be OT.
Yesterday I witnessed a male Chinese bus commuter shouting abuse at a bus driver because the latter could not turn in fast enough due to heavy traffic at Clementi Mall bus stop.
Just this evening a middle aged Chinese lady shouted abuse non-stop for 3 minutes at an elderly (about 70 or 80 years old) female table cleaner, at Maxwell Food Centre near to the Teochew Rice and Porridge stall. After that the lady muttered to herself for a long time while sitting at the table.
Guess some folks in this society are going bonkers or they may have some unhappiness which needs an outlet.