asking the wrong questions, u extrmist.
even if by some miracle, the oppos-combined win a majority, they will still be split into various parties. it's long suspected that some or most of them have been infiltrated by pappy moles OR actually started by moles (i.e. the walls ice cream party).
that means more infighting, which means pappies would come even before 5 years is up. remember that other than the politicks moles, they have the gurkhas, they have all their paper generals in the SAF/airforce/navy/SPF/, and they have their loyalists deeply entrenched in the bureacracy & legal system too!
at the first sigh of chaos among the oppos, they could easily stage a civil servant coup backed by lawmakers and bureacrats. if they dun want to do it the marginally legal way, they can even copy thailand and use military coups over and over again.
this is a long drawn out war. have patience. your children may not see the end of it... unless of course singapore get annexxed by mat-laysia or indon-mee, then no need to talk anymore.