I suppose higher costs in Malaysia may also be an indication that it is more affluent and progressing well?
In a way, it is. Nowadays locals do not want to work in factories anymore. They prefer IT or Office work.
Thailand is now experiencing what Malaysia had in the 80s. The illegals from Cambodia or Burma or Laos is flooding their padi fields. Pushing out the locals to towns. So it is a matter of time, office labour cost would rise. Samething will happen to Vietnam.