Those under the age of 40 are only eligible to receive the AstraZeneca jab, which has been linked to rare blood clotting incidents.
Vaccination incentive schemes have been implemented successfully around the world; the US state of Ohio increased its Covid immunisation rate by 49 per cent by offering $1million lottery draws.
A study meanwhile by the Growth Intelligence Centre think tank found Australians would be more likely to get vaccinated if they were offered cash incentives from just $50, News Corp Australia reported.
Tabcorp's Lotteries and Keno managing director Sue van der Merwe said the gambling giant had already shown financial support for the national vaccination effort.