SMRT Driver refuse to work?? or its a strike??

Yesterday 100 SMRT drivers from China "Refuse to Work"? Or is it a "Strike"?

see link below:
http://news.insing.com/tabloid/bus-drivers-refuse-to-work/id-06663f00
http://www.channelnewsasia.com/stories/singaporelocalnews/view/1239482/1/.html

What is the meaning of "Strike"? OK let me check the dictionary.. 

Definition of strike:  [no object] (of employees) refuse to work as a form of organized protest, typically in an attempt to obtain a particular concession or concessions from their employer: workers may strike over threatened job losses..

So "refuse to work" is = to a strike...  Let faced it...

Yes we do need foreign workers to fill this sector gap, how many Singaporean willing to be Bus Captain? (raise up your hands)..But by bring in foreign workers,, we faced another set of problems. Foreign workers does bring along their work culture and employee right from their own country of origin.. We can't blame them but we also can;t afford to let them to create social problem to our country.. 

These foreign workers compare their salary to their Malaysian colleague.. but have they consider their paper qualification, English language proficiency, more hard working then their Malaysian colleague? Do they know that high pay comes with more responsibility? Only they themselves know the answer.. I am sure SMRT have a better reason to give a better salary to the Malaysian...