It's most definitely your money. You earned it. The money was transferred from your employer's bank account to an account in your name. The only difference is you can't spend it today.
( It was a clever mind hack by the Keating Labor government to have super not be a subset of your base salary, but rather as an on-top-of entitlement for employees—or from the employer's perspective, an additional wages cost just like payroll tax. Had it gone the other way, people would be more sensitive to their earned money being locked away. )
