VCC as cabin crew
It is unlikely that many VCC would take up permanent positions of cabin crew for the simple reason that they would almost certainly suffer a cut in salary which, in some cases, would amount to tens of thousands a year. This is what happens when people voluntarily move jobs as they would then work according to the pay scales, terms and conditions of their new job. It's only those who are in a redeployment situation, meaning CareerLink, who would not suffer as they would get a pay differential, being their current salary less the top of the main crew salary scale.
Of course, cabin crew get allowances which would help to make up the difference, but many VCC would still be out of pocket.
Having said all of that, some VCC would become cabin crew as they want the lifestyle.