Ask yourself this question.
What will Singapore Government benefit if they solve all these transportation problems? People's problems are not their problems. Their problem is to make sure Singapore is economically protected.
counter argument is by letting some Sg stay in JB, the ppty prices in SG will not climb so high till biz suffers ? especially so if the 6.9m population thing comes true, which is increasingly likely since PAP won the landslide election.