Section 46 of the constitution states Barnaby Joyce may be sued 100 pounds (in 1900 money) for every day that he sat illegally. He has sat for 13 years.
13 x 365 x 100
=474500 pounds
=$63,289,639.75
https://www.rba.gov.au/calculator/annualPreDecimal.html
#SueBarnaby
46 Penalty for sitting when disqualified
Until the Parliament otherwise provides, any person declared by this Constitution to be incapable of sitting as a senator or as a member of the House of Representatives shall, for every day on which he so sits, be liable to pay the sum of one hundred pounds to any person who sues for it in any court of competent jurisdiction.