$1 million a year is not nearly enough to move interstate ??
For a start, you would get the 15% kicker added on to that giving you an extra $150K per annum to play with which would easily cover your property rent (why would you buy straigtht away ??) plus cost of living and I dare say you'd have a fair bit left over too.
I'm no tax expert but I reckon a good tax agent may be able to get you some benefits on the property rental every year too.
$1 million a year may be enough for you or me to move, it clearly isn't for Smithdogmaddog and it won't be for everyone. Upping someone's wage from $100,000 to $1,000,000 would probably entice most but upping it from $1,000,000 to $1,150,000 would entice a lot less I reckon.
Teachers get moved around all the time !!
I had a quick look at the teachers EBA - https://www.education.vic.gov.au/hrweb/Documents/VGSA-2017.pdf - I couldn't see any clauses that allowed for transfer without agreement. I could be wrong as it was only a cursory check with CTRL-F