No, you can't withdraw amounts over $1.6M from your superannuation fund unless you have reached your preservation age and meet the criteria, ie Retired from the workforce.
Sent an email to my local MP and got this reply..
Thanks XXXXX.
Let me follow up with the Superannuation Minister about your idea for access to it if above $1.6m.
Regards,
Alan.
HON ALAN TUDGE MP
Federal Member for Aston
Minister for Cities, Urban Infrastructure and Population
