<i>Penalize them financially for making mistakes</i> - that is illegal in Australia, see <a href="https:&#x2F;&#x2F;www.fairwork.gov.au&#x2F;pay&#x2F;deducting-pay-and-overpayments" rel="nofollow">https:&#x2F;&#x2F;www.fairwork.gov.au&#x2F;pay&#x2F;deducting-pay-and-overpaymen...</a>