Is there a pay increase between undergraduate and MBA students?

In 2023, the Australian Government Department of Education, Skills and Employment Graduate Outcomes Survey found that working professionals without a postgraduate degree received a median salary of $71,000 per year, while those with a postgraduate degree in addition to their undergrad degree earned on average $97,000 per year.
According to the 2023 Alumni Insights Report, salary growth comes quickly for students as some see a $15,000 income increase during their MBA studies, and beyond the average salary of MBA respondents in Australia is $161,000*.